bgp_communities - Update 'aann' option, Fix issues in merged state

[ArunSaravananBalachandran]

SUMMARY

Incorporate the below changes in sonic_bgp_communites module:

• Change 'aann' as a suboption of 'members' and update it to support 'list of strings'.
• Fix issue in merged state for standard community-list when community options are specified as 'False'.
• Update default value behavior for 'type' and 'match' to be in-line with 'permit'.
• Update documentation, UT and regression test cases.
• Resolve ansible-lint reported failures.

GitHub Issues

List the GitHub issues impacted by this PR. If no Github issues are affected, please indicate this with "N/A".

GitHub Issue #
N/A

ISSUE TYPE

• Feature Pull Request

COMPONENT NAME

• sonic_bgp_communities

OUTPUT

ADDITIONAL INFORMATION

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.
• I have provided a summary for this PR in valid "fragment" file format in the "changelogs/fragments" directory of this repository branch. Reference : Ansible Change Log Document

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Please also list any relevant details for your test configuration

Regression report: bgp_communities_regression_report-2024-09-12-16-42-06.pdf