Integration branch 2022 wk 30:

MR !1616 NR SA tutorials v2
MR !1620 nr_pdcp: nia1 implementation
MR !1622 CI: do not trigger tests if nothing is tagged NSA
MR !1623 Fix for ssb subcarrier offset in case of f<3GHz
MR !1606 code maintenance
MR !1568 Add undefined behavior sanitizer in build_oai, fix some errors
MR !1587 Dynamically build L2sim proxy
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