[jdk8u-dev] RFR: 8293107: GHA: Bump to Ubuntu 22.04

[Zdenek Zambersky]

Updates GHA workflow to Ubuntu 22.04.

**Notes:**
- code changes were done manually here (GHA workflows were rewritten in newer JDKs)
- Ubuntu 20.04 runner image for GHA is already deprecated and will be [unsupported soon](https://github.com/actions/runner-images/issues/11101)
- sysroot update to bullseye was already [done separately](https://github.com/openjdk/jdk8u-dev/pull/491)  (update to ubuntu 22.04 was not done at the time, it was blocked by [JDK-8281096](https://bugs.openjdk.org/browse/JDK-8281096) )

**Testing:**
tier1 in GHA: OK

Failures:
- jdk/security_infra failures - unrelated
- linux x86 hotspot/tier1
  - `gc/concurrentMarkSweep/CheckAllocateAndSystemGC.java` timeout, seems unrelated
- macOS
  - 2 known failures, addressed by: https://github.com/openjdk/jdk8u-dev/pull/553

-------------

Commit messages:
 - GHA: update to ubuntu 22.04 and bullseye sysroot

Changes: https://git.openjdk.org/jdk8u-dev/pull/628/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=628&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8293107
  Stats: 7 lines in 1 file changed: 0 ins; 0 del; 7 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/628.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev.git pull/628/head:pull/628

PR: https://git.openjdk.org/jdk8u-dev/pull/628