[jdk21u] RFR: 8284772: GHA: Use GCC Major Version Dependencies Only

Mon Aug 28 13:03:29 UTC 2023

This keeps 21u in sync with 8u, 11u, 17u & trunk where the minor version check has either been removed or (in the case of 17u) proposed for removal.

This pull request contains a clean backport of commit [7e843c22](https://github.com/openjdk/jdk/commit/7e843c22e718ad17e0ea7223f10a26fb62477157) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

The commit being backported was authored by Andrew John Hughes on 23 Aug 2023 and was reviewed by Julian Waters, Aleksey Shipilev, Thomas Stuefe, Erik Joelsson and Sergey Bylokhov.

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Commit messages:
 - Backport 7e843c22e718ad17e0ea7223f10a26fb62477157

Changes: https://git.openjdk.org/jdk21u/pull/111/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk21u&pr=111&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8284772
  Stats: 23 lines in 3 files changed: 0 ins; 18 del; 5 mod
  Patch: https://git.openjdk.org/jdk21u/pull/111.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u.git pull/111/head:pull/111

PR: https://git.openjdk.org/jdk21u/pull/111