Add mgmt servers module

[stalabi1]

SUMMARY

I added the mgmt servers module.

Please see model PR.

ISSUE TYPE

• Feature Pull Request

COMPONENT NAME

sonic_mgmt_servers

OUTPUT

regression-2024-07-22-09-57-29.html.pdf
diff_output.log
facts_gathering.log
check_merge.log
check_delete.log

Checklist:

• I have performed a self-review of my own code to ensure there are no formatting, linting, or security issues
• I have verified that new and existing unit tests pass locally with my changes
• I have not allowed coverage numbers to degenerate
• I have maintained at least 90% code coverage
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• I have maintained backward compatibility or have provided any relevant "breaking_changes" descriptions in a "fragment" file in the "changelogs/fragments" directory of this repository.