[backport][serverless] trigger consolidated pipeline on tags (#6052 =…

…> v2) (#6053)

## Summary of changes

Removes exclusion of pipeline trigger for tags.

## Reason for change

Serverless requires a build on a tag in order to have a production ready
pipeline to use.

## Implementation details

n/a

## Test coverage

## Other details
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.azure-pipelines/ultimate-pipeline.yml

@@ -9,7 +9,6 @@ trigger:
       - hotfix/*
     exclude:
       - refs/pull/*/head
-      - refs/tags/*
   paths:
     exclude:
       - .azure-pipelines/noop-pipeline.yml