RFR: 8363966: GHA: Switch cross-compiling sysroots to Debian trixie

[Aleksey Shipilev]

Same as [JDK-8363965](https://bugs.openjdk.org/browse/JDK-8363965), but switching to Debian trixie. We have waited for about a month for it to stabilize, and it seems good to switch now. The benefit of doing this now is making RISC-V sysroot more stable using the same distro as everything else.

Additional testing:
 - [x] GHA

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Commit messages:
 - Fix

Changes: https://git.openjdk.org/jdk/pull/27047/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27047&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8363966
  Stats: 6 lines in 1 file changed: 0 ins; 0 del; 6 mod
  Patch: https://git.openjdk.org/jdk/pull/27047.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27047/head:pull/27047

PR: https://git.openjdk.org/jdk/pull/27047