Merge [pyrai_oct_upkeep_ac] into [development]

Adds DATE tag;

Updates external RPMs to latest available via DNF which bypasses need to continuously update RPM package from hardening manifest;

Updates R packages to latest available via import with hardening manifest;

Aggregates file cleanup commands to run with one RUN command to save dockerfile image size;

Modifies user permissions for home directory (see Dockerfile line 86);

All CVEs have justifications provided in VAT (https://vat.dso.mil/vat/image?imageName=aiml/python/python-r-ai&tag=4.2.1&branch=pyrai_oct_upkeep_ac);

For related issue ticket see:

#37 (closed)