SONiC YANG model support for RADIUS.

[shdasari]

Why I did it

Added SONiC YANG model for RADIUS.

How I did it

Added the RADIUS and RADIUS_SERVER tables for global and per RADIUS server configuration. RADIUS statistics reside in COUNTERS_DB and are not part of the configuration. These are not a part of this PR.

How to verify it

Compiled sonic_yang_mgmt-1.0-py3-none-any.whl.

Which release branch to backport (provide reason below if selected)

• 201811
• 201911
• 202006
• 202012
• 202106
• 202111
• 202205
• 202211

Description for the changelog

SONiC YANG model for RADIUS.

Ensure to add label/tag for the feature raised. example - PR#2174 under sonic-utilities repo. where, Generic Config and Update feature has been labelled as GCU.

Link to config_db schema for YANG module changes

A picture of a cute animal (not mandatory but encouraged)

[xumia]

/azp run Azure.sonic-buildimage

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[yxieca]

@shdasari in future, when you help cherry-picking a change from master branch, please mention the original PR in the PR comments. So that I can mark the original PR as cherry-picked.

I suppose you are cherry-picking #12749?

[shdasari]

@shdasari in future, when you help cherry-picking a change from master branch, please mention the original PR in the PR comments. So that I can mark the original PR as cherry-picked.

I suppose you are cherry-picking #12749?

Yes, I have cherry-picked #12749. Will add original PR number henceforth.