Merge [jlabcv_pip_rewrite_ac] into [development]

Continues the rewrite of jupyerlab tree to utilize pip install via requirements text file rather than thru import via hardening manifest;

Update tags to use for base image from jlab-dl:latest to jlab-dl:3.4.4;

Update tags for container to align with opensource jupyterlab's latest version;

Remove import of python packages via hardening manifest - no external resources section;

Update list of maintainers;

Create requirements.txt file listing python packages to be installed;

Update Dockerfile to use requirements.txt file for pip installation method;

Remove commands in Dockerfile no longer needed due to new build method;

No CVEs present from feature branch in VAT (https://vat.dso.mil/vat/container/20954);

For related issue ticket see: