[MIGRATION] Test and verify the migrated jobs on the new jenkins server

[rishabh6788]

Creating this issue to track testing and verification of public jenkins server.
We need to start migrating all the credentials and global environment date from current jenkins server to public jenkins server.

[peterzhuamazon]

A few things to consider on high level:

• Global env variables migration #133
• Setup S3 bucket on the prod jenkins account
• https://ci.opensearch.org cloudfront consume new prod jenkins account S3 bucket, with lambda
• Agent node configuration migration
• Get distribution build / validation / integTest workflows migrate and run before everything else
• Add docker build in the mix as well

[bbarani]

@peterzhuamazon will be working on migrating the gradle check job to public Jenkins

[rishabh6788]

Issues found and fixed so far #116 and #125.
PRs to add required functionality to run jobs: #117, #126, #128, #129 and #131.
Did one time copy of jobs data from current jenkins to public jenkins.

Pending actions:

1. Resync jobs data from current jenkins to public jenkins.
2. Sync the current artifact S3 bucket with with public jenkins artifact bucket.
3. Update cloudfront url to point to public jenkins artifact S3 bucket.