[jdk21u-dev] RFR: 8341861: GHA: Use only retention mechanism to remove bundles

[Aleksey Shipilev]

In addition to benefits listed in RFE itself, this syncs up GHA configs across JDK releases, avoids future merge conflicts in GHA code.

Additional testing:
 - [x] GHA

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Commit messages:
 - Backport 29ae26517f9c1fd5e641b3a560aa93e370920506

Changes: https://git.openjdk.org/jdk21u-dev/pull/1925/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1925&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8341861
  Stats: 44 lines in 1 file changed: 0 ins; 44 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1925.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1925/head:pull/1925

PR: https://git.openjdk.org/jdk21u-dev/pull/1925