RFR: 8345698: Remove tier1_compiler_not_xcomp from github actions

[Leonid Mesnik]

The fix for
https://bugs.openjdk.org/browse/JDK-8345435
delete tier1_compiler_not_xcomp group
but don't remove corresponding testing from github actions.

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Commit messages:
 - 8345698: Remove tier1_compiler_not_xcomp from github actions

Changes: https://git.openjdk.org/jdk/pull/22612/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22612&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8345698
  Stats: 6 lines in 1 file changed: 0 ins; 5 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/22612.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22612/head:pull/22612

PR: https://git.openjdk.org/jdk/pull/22612