scala: use latest JDK

[liff]

Motivation for this change

Scala 2.12, 2.13 and 3.x support latest Java versions just fine and since sbt already defaults to latest jdk attribute anyway, it doesn’t seem necessary to override that for the standalone compilers.

Scala 2.11 doesn’t work, without workarounds, on Java 11 and later so that and 2.10 will go on using 8.

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 21.11 Release Notes (or backporting 21.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
  • (Release notes changes) Ran nixos/doc/manual/md-to-db.sh to update generated release notes
• Fits CONTRIBUTING.md.

[SuperSandro2000]

@cole-h and another PR

@ofborg eval

[kubukoz]

Can this be backported to 21.11?

[github-actions]

Successfully created backport PR #151691 for release-21.11.