[CI] Need automate version bump PR to be opened once OpenSearch/Dashboards release new versions

[peterzhuamazon]

As of now, we are relying on human efforts to bump OS/OSD versions once there is a new release. This could delay the release on these platforms and could add to human errors. We need a github action to automatically open a PR after detecting the new releases.

[TheAlgo]

I am still of the opinion to have release branches for charts 😄

The maintainers can branch out from main and have releases enabled only on branches apart from main.

[viceice]

renovate can so this in an automated way 🤗