[3006.x] Ensure on rpm and deb systems, that user and group for existing Salt, is maintained on upgrade

[dmurphy18]

What does this PR do?

On upgrading on Redhat and Debian families, ensures that existing permissions (user, group) are preserved.

What issues does this PR fix or reference?

Fixes: https://github.com/saltstack/salt/issues/65264

Previous Behavior

Upgrades would force Salt directories etc. permissions user:group to salt:salt

New Behavior

Upgrades of Salt, now note the permissions (user:group) of Salt directories and preserves those permissions.

Merge requirements satisfied?

[NOTICE] Bug fixes or features added to Salt require tests.

• [ ] Docs
• [X] Changelog - https://docs.saltproject.io/en/master/topics/development/changelog.html
• [ ] Tests written/updated

Commits signed with GPG?

Yes

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[dmurphy18]

Proposed to @barneysowood that I take over https://github.com/saltstack/salt/pull/66047 and https://github.com/saltstack/salt/pull/66050 since they are not receiving enough attention

[dmurphy18]

Taken over #66047 and #66050 with @barneysowood permission

[dmurphy18]

Run into testing infrastructure problem, with --no-install on the CLI, runs into missing salt-master since shutil.which("salt-master") fails, since it is NOT INSTALLED :faceplam:, confirmed with 3006.x branch with same command:

nox -e 'ci-test-onedir-pkgs' -- upgrade --prev-version=3006.8  -vv --run-destructive --no-install --log-level=TRACE --log-cli-level=TRACE --log-file-level=TRACE 2>&1 tests/pytests/pkg/upgrade/test_salt_upgrade.py | tee ~/mytest.log

Working on solution. Note: the --no-install on CLI negates upgrade, and when fails due to command

nox -e 'ci-test-onedir-pkgs' -- upgrade --prev-version=3006.8  -vv --run-destructive --log-level=TRACE --log-cli-level=TRACE --log-file-level=TRACE 2>&1 tests/pytests/pkg | tee ~/mytest.log

and the above command introduces the --no-install internally and hence failure.

[dmurphy18]

Fixing test_salt_api.py in tests/pytests/pkg/integration, packaging tests appear not to have been completed before the Broadcom buyout was finalized and running into issues as implementing upgrade/downgrade tests.