JDK 24 and 25-ea

[SethTisue]

24 is GA today

but we don't need to rush to do anything before it becomes available from Temurin and available in GitHub Actions

OSS:

• wait for Temurin availability at https://adoptium.net/temurin/releases/
• wait for GitHub actions availability
• 2.12.x re-STARR
• 2.13.x re-STARR
• Scala 2: CI: mergelies: drop JDK 23, add JDK 24 scala#11022
• community build: drop JDK 23, add JDK 24 community-build#1729
• Scala 3: ASM upgrade: Update asm to 9.8.0 scala3#23004
• Scala 3: CI: suggest it to Hamza I guess?

internal:

• Fortify CI (24 only, iirc)

[SethTisue]

I'll address the community build part of this in a few weeks.