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

[Christoph Langer]

On Wed, 25 Jun 2025 14:40:06 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> 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

LGTM

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Marked as reviewed by clanger (Reviewer).

PR Review: https://git.openjdk.org/jdk21u-dev/pull/1925#pullrequestreview-2961335672