RDKB-60325 notify_tunnel_status failure in hotspot

[rajkamal-cv]

RDKB-60325 : notify_tunnel_status failure in hotspot

Reason for change:

1. TunnelStatus_EventSubHandler has been added. autoPublish set to false. - https://github.com/rdkcentral/hotspot/pull/5/files#r2653220170
2. Modify WAN_FAILOVER_SUPPORTED macro to address the review comment - https://github.com/rdkcentral/hotspot/pull/5/files#r2653184868
3. Ensure rbus is linked even when WAN_FAILOVER_SUPPORTED macro is not defined

Test Procedure: TunnelStatus should get notified successfully
Risks: Low
Priority: P2

This is also a relevant PR - rdkcentral/provisioning-and-management#156

[rajkamal-cv]

@snayak002c / @apattu200 please review.

This is also a relevant PR - rdkcentral/provisioning-and-management#156

[apattu200]

@rajkamal-cv Please help with below queries

1. Is this a Bug or a User Story (US)?
2. If it is a User Story:
   • Have all dependent PRs from other components been listed (if any)?
   • Does the commit message include both the User Story ticket and the Subtask ticket?
   • Will be all changes related to the User Story squashed and merged in a single commit?
   • Has the PR been raised only after completing all changes for the User Story (no partial changes)?
   • Has code development for the User Story been completed?
     • If yes, has the Gerrit topic or list of all dependent PRs across components (including meta-layer changes) been shared?
3. Is there a validation log available in the Jira ticket for verifying builds with the updated generic-srcrev.inc across all platforms?
   • If yes, have the links to validation comments been shared?

[rajkamal-cv]

@rajkamal-cv Please help with below queries

1. Is this a Bug or a User Story (US)?

RDKB-60325 is a bug

2. If it is a User Story:

   • Have all dependent PRs from other components been listed (if any)?

   • Does the commit message include both the User Story ticket and the Subtask ticket?

   • Will be all changes related to the User Story squashed and merged in a single commit?

   • Has the PR been raised only after completing all changes for the User Story (no partial changes)?

   • Has code development for the User Story been completed?

     • If yes, has the Gerrit topic or list of all dependent PRs across components (including meta-layer changes) been shared?

3. Is there a validation log available in the Jira ticket for verifying builds with the updated generic-srcrev.inc across all platforms?

   • If yes, have the links to validation comments been shared?

Gerrit verification build passed - https://gerrit.teamccp.com/#/c/943504/

The logs are updated in Jira - https://ccp.sys.comcast.net/browse/RDKB-60325?focusedId=24414583&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-24414583