[jdk21u] RFR: 8314656: GHA: No need for Debian ports keyring installation after JDK-8313701

[Aleksey Shipilev]

On Wed, 30 Aug 2023 08:29:35 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Clean backport to maintain clean undiverged GHA between releases.
> 
> Additional testing:
>  - [x] GHA

Testing is clean. Push approval granted.

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PR Comment: https://git.openjdk.org/jdk21u/pull/118#issuecomment-1700550692