IBM Semeru (adoptopenjdk API?) support for java-version datasource

[MPV]

Why

Here's a few cases for when this has been asked for:

• Support for ibm-semeru-runtimes Docker images #30333
• feat(manager/asdf): add support for java semeru and semeru-jre #25063

How

There may be multiple ways to solve this, here are some ideas:

1. Use GitHub Releases, similar to:

   • https://github.com/ScoopInstaller/Java/blob/master/bucket/semeru-lts-jre.json#L18-L19
   • As earlier discussed here:
     • feat(manager/asdf): add support for java semeru and semeru-jre #25063 (comment)
   • Manually solved here (using customDatasources):
     • https://github.com/MPV/renovate-asdf-semeru/blob/cbeaf57701212847ff39ceea3aee00ee0f2d4da2/renovate.json#L7-L27
     • Update dependency java to v11.0.26+4_openj9-0.49.0 (from 11.0.20.1+1_openj9-0.40.0) MPV/renovate-asdf-semeru#3

2. Use the AdoptOpenJDK API

   • i.e. along the lines of:
     • https://api.adoptopenjdk.net/v3/info/release_names?vendor=ibm&page_size=20
   • detailed at:
     • https://api.adoptopenjdk.net/q/swagger-ui/#/Release%20Info/getReleaseNames
     • https://www.ibm.com/support/pages/semeru-runtimes-getting-started

---

For some details on why Semeru isn't included in the Adoptium API but via the AdoptOpenJDK API:

• https://api.adoptopenjdk.net/

  Clients that require OpenJ9/Semeru builds for now can continue to use AdoptOpenJDK. However, should look out for the upcoming Semeru api that will be the future delivery channel for Semeru builds.

• Add API support for Semeru "Editions" adoptium/api.adoptium.net#187