Add Dell Enterprise SONiC 'ipv6_router_advertisement' module

[ArunSaravananBalachandran]

SUMMARY

• Add Enterprise SONiC 'ipv6_router_advertisement' resource module:
  • Provide data definitions in 'argspec'.
  • Implement 'facts' to gather facts for the module.
  • Implement 'config' to apply configurations for merged, deleted, replaced and overridden states.
  • Implement support for 'check' and 'diff' modes.
• Define regression and unit test cases to verify correct functionality of ipv6_router_advertisement resource module.

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_ipv6_router_advertisement

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?

Regression report: ipv6_router_advertisement_regression_report.zip

ansible-lint logs:

ansible-lint plugins/modules/sonic_ipv6_router_advertisement.py tests/regression/roles/sonic_ipv6_router_advertisement/ tests/unit/modules/network/sonic/fixtures/sonic_ipv6_router_advertisement.yaml

Passed: 0 failure(s), 0 warning(s) on 10 files. Last profile that met the validation criteria was 'production'.