Use a script, which can be tested independently of CI code (by running
it on the host on which it will be used), and print the directory that
has been prepared in the HTML.  Also, in the description, use the
infinitive/imperative(?) of the verb to harmonize with other steps.

A lot of CI code is python mixed with bash, e.g.,

    ssh = getConnection(host)
    ssh.run('ls')
    ssh.run('echo')

At least some of this CI code would benefit if it was written in a
simple bash script, returning error codes and potentially other
information either through stdout/stderr or files, to the calling Python
code:

    ssh = runScript(host, script)
    # script does: ls; echo

This commit introduces the possibility to run entire scripts. The idea
is that the executor has a script (on localhost), which is either
executed locally or on a remote host. For the remote host, the script is
not copied but piped into a remotely executed bash. In both cases,
output is either returned like the Cmd.run() function with returncode
and mixed stdout/stderr, or optionally redirected into a file on the
(remote) host, which can be treated further by the Python code in later
steps.

This reimplements the CI deployment functions, and makes them a bit more
robust.  Concretely:

- Introduce a generic "deployment tag" option that can be used to
  override the tag to use for specific images. By default, it is the
  current "branch-commitID[0:8]" tag name (requires the change from
  function ImageTagToUse() to CreateTag(), impacting also pull/push
  image functions)
- Avoid sed for image names, and use an .env file that docker-compose
  picks up automatically; the deployment analyzes a potentially existing
  .env file and updates instead of simply overriding. For instance, some
  pipelines might use -asan images for the gNB and "normal" (non-asan)
  images for UE, and a simple overwriting might make the -asan image
  name tag disappear for the gNB, resulting in deployment failures).
  Finally, undeployment removes the .env file, so that there are no
  modifications in the repository after undeployment.
- Redo the previous behavior of autodetecting asan, and use that (the
  current function always uses asan, no matter what)
- Remove deployKind/displayedNewTags globals, as they are not necessary
- Make the usedImage output in HTML slimmer
- On undeployment, print service names next to undeploy analysis, and
  return success/failure.
- Make the functions generally less verbose and easier to read

Note that as of and only in this commit, deployment does not work, as
all the YAML files have not been updated to work with this updated
version.  The next commit adds tests for the new deployment, and updates
one YAML file (also being used in the tests). The follow-up commit then
modifies all YAML files.

The BuildeNB steps either does things that are already implemented
(created workspace), or things that we don't use (separate build_wait),
and is generally quite convoluted when all it does is calling build_oai.
Reimplement by reusing Create_Workspace, and make build_oai in a single
step. To clean up, make a new module in which this function does not
need a class instantiation. Instead, we give all necessary parameters
directly.

The next commit will use "echo -e". The problem with that is that bash
and sh differ:

- in bash: this results in "a\nb" (a+newline+b)
- in sh: this results in -e a\nb (-e a+newline+b)

The problem is that by default, commands are executed through sh, which
nobody expects. Change to bash, which is likely more aligned with what
people want to use.

After the previous commit, the CI will always do an undeployment step
even if the CI failed. Hence, these XMLs are not necessary anymore. Some
XMLs are updated to do what their "cleanup XML" counterparts did, such
as removing additional images.

Use the previous commit on returning success from each task execution
function, and implement handling of errors in the main loop. Add a
script with which this is visible using Custom_Commands.

The repeatCount property is useless: it would be enough to specify the
same XML multiple times to achieve the same thing.

For reasons I don't understand, the XML option reading and actual test
case execution are at different places in the code. This is problematic,
because what this led to is that options are not passed as function
arguments, but indirectly through class members. This led to a lot of
"indirect code"; it's a total mess

To improve this, move them together, so that parameters can be passed
directly as function arguments later on.

Because we reference the globals, mark them inside
ExecuteActionWithParam(). That is a Python antipattern, but necessary at
this moment. I believe that we can remove the following globals over
time:

- SSH (with new cls_cmd, which we don't need to pass)
- EPC (replaced through a class similar to ue_module, i.e., refer to
  core networks on specific hosts through an ID, instead of a global)
- HTML (should use templating, where individual functions give back a
  dictionary of what they want to print, and a final pass assembles the
  entire HTML file)
- RAN/SCA/PHYSIM/CLUSTER/ldpc (can be replaced with stateless scripts
  build/run eNB/gNB on a specific node)

Update the regex for both sender and receiver data to allow optional
bitrate unit prefixes - accepts also no prefix. Modify the patterns for
lost and total packets to accept negative values (`-?\d+`).

Add some basic unit tests to verify that Iperf/Ping work. Harmonize the
logging by only print in the "main" iperf/ping function, to avoid that
if we test with multiple UEs, the output intermixes. Also, do one common
mkdir before starting multiple pings/iperfs. Finally, harmonize the
paths so that Iperf and Ping log their files in the same place.

Integration: `2024.w38b`

Closes #839

See merge request oai/openairinterface5g!2977

* !2704 nr pdcp: add support for nea1
* !2800 UE improvements
* !2920 Receive SIB19 on nrUE
* !2975 Remove hardcoding of CPU measurements (respect option `-q`)
* !2976 Update latest SIMDE version
* !2957 T: increase max number of args
* !2916 NR UE PUSCH resource mapping optimization
* !2787 CI: increase max number of concurrent workers to 64
* !2974 fhi_72: allow to provide dpdk_mem_size to xran
* !2964 CI: Replacing the UE on Aerial setup
* !2973 CI: remove unused code and files