[1.x] Remove `generateVersionFile` from `ZincBuildUtil`

[Friendseeker]

Issue

Currently compiler-interface jar on maven central is not reproducible. For example, https://repo1.maven.org/maven2/org/scala-sbt/compiler-interface/1.10.5/compiler-interface-1.10.5.jar contains a file incrementalcompiler.version.properties, which contains a build timestamp.

version=1.10.5
timestamp=20241130T035052

Fix

We remove the incrementalcompiler.version.properties generation logic from Zinc.

Note

sbt does use incrementalcompiler.version.properties in https://github.com/sbt/sbt/blob/1.10.x/zinc-lm-integration/src/main/scala/sbt/internal/inc/ZincComponentManager.scala, but since

• Only sbt reads from incrementalcompiler.version.properties, all other build tools don't
• Creation of incrementalcompiler.version.properties uses analysis timestamp, which will be erased by default in zinc 2.x

We should still proceed with the removal of incrementalcompiler.version.properties on zinc side, and also remove the usage of incrementalcompiler.version.properties on sbt side.

[eed3si9n]

This is probably a good idea, but we need to remove the usage side first before breaking sbt?