As of this commit, the CI would take too much time to process dl_sim.
This commit activate optimizations to be within the CI time limits.

get_index_for_dmrs_lowpapr_seq() was accessing the array dmrs_ul_allocated_res[] out of bounds.

except for:
- config module

Except for:
- polar code

Fix warning, drop undefined function

Except for config module and dlopen()

except:
- from dlopen()
- from configuration module
- uninitialized value

term_nr_ue_signal() frees all memory, except for dfts lib load

Frees all allocated memory, except for library loading related, and ul
reference signal sequences, which are allocated in static variables

- introduce loader_reset() that frees all memory
- resolve memory leak in loader_format_shlibpath()
- correctly handle library reload: check if a function has been
  retrieved already. Don't leak memory (strdup()), and handle multiple
  reloads of different functions from the same SO