Update gradle to 8.14.3

[janhoy]

Supports Java 24, so we can then add matrix of JDK versions to run the BATS tests for.
I suppose we need to go to gradle 9 to get JDK 25 support eventually, but this is a stepping stone.

[janhoy]

Enabled BATS run on JDK24 but our build is not yet compatible...

[dsmiley]

Question: did you take anything from Lucene's same upgrade? We share the same build infra... granted it grows increasingly divergent.

[janhoy]

Nope, just a quick attempt. Makes sense to peek at their pr if they already upgraded.

[janhoy]

See apache/lucene#14591 for Lucene's upgrade PR.

[janhoy]

Looks like we need to upgrade errorProne to be able to compile Solr under JDK24?

> Task :solr:api:compileJava
error: An unhandled exception was thrown by the Error Prone static analysis plugin.
     Please report this at https://github.com/google/error-prone/issues/new and include the following:
  
     error-prone version: 2.31.0
     BugPattern: (see stack trace)
     Stack Trace:
     java.lang.NoSuchFieldError: Class com.sun.tools.javac.code.TypeTag does not have member field 'com.sun.tools.javac.code.TypeTag UNKNOWN'
  	at com.google.errorprone.util.ASTHelpers.<clinit>(ASTHelpers.java:1301)
  	at com.google.errorprone.bugpatterns.PackageInfo.matchCompilationUnit(PackageInfo.java:39)
  	at com.google.errorprone.scanner.ErrorProneScanner.processMatchers(ErrorProneScanner.java:449)

[malliaridis]

Looks like we need to upgrade errorProne to be able to compile Solr under JDK24?

We are 10 minor versions behind and a lot of new checks have been added. Would be a good idea to update it first.

But for backporting we should take this information into account (we might not be able to backport to 9.x).

[janhoy]

Yes, I'm aware that 9.x needs to stay on 2.31. I have started to adapt #3116 with the missing rules..

[dsmiley]

IMO we should leave multi-JDK testing to Jenkins, and keep these GHA CI for PRs where we don't need to test multi-JDK. The likelihood of breaking another JDK is small, and wouldn't be specific to the bats tests.