Add script similar to gradle-check to invoke benchmark-pull-request job from github actions workflow

[rishabh6788]

Description

Add a script similar to gradle-check that gets executed during github workflow execution to submit new builds for benchmark-pull-request using generic webhook token.

Since this workflow will not be part of CI approval actions, it is safe to just submit the job and update the PR with job link, than to keep polling the job till it finishes. Also, some jobs can take 3-4 hours to finish.

Issues Resolved

opensearch-project/OpenSearch#14553
#4845

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[rishabh6788]

See sample output rishabh6788/OpenSearch#5 (comment) and workflow run https://github.com/rishabh6788/OpenSearch/actions/runs/9916191960/job/27398145911

[gaiksaya]

How about putting this script in build-lib repo?
For a workflow running in OpenSearch repo, the scripts are all over the place. I think OS or build-lib should be the right place. I believe even the gradle-check script should be moved. WDYT?

[rishabh6788]

How about putting this script in build-lib repo? For a workflow running in OpenSearch repo, the scripts are all over the place. I think OS or build-lib should be the right place. I believe even the gradle-check script should be moved. WDYT?

Thanks for the feedback @gaiksaya.
Can I merge this for now and track the movement of all the scripts to build library repo in another issue?

[rishabh6788]

Merging this and will track scripts migration task in another issue.