RFR: 8293107: GHA: Bump to Ubuntu 22.04 [v4]

[Aleksey Shipilev]

> WIP, depends on #10083.
> 
> At this point, we can switch to Ubuntu 22.04 as the base for GHA runners. GHA would switch `ubuntu-latest` soon:
>  https://github.blog/changelog/2022-08-09-github-actions-ubuntu-22-04-is-now-generally-available-on-github-hosted-runners/
> 
> This gives us several benefits:
>   - we can expect that the availability of 20.04 runners would decline in future, while 22.04 enabled runners would become more available;
>   - toolchains would now include GCC 11;
>   - RISC-V cross-builds would become available; 
> 
> Additional testing:
>  - [ ] GHA

Aleksey Shipilev has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:

 - Merge branch 'master' into JDK-8293107-ubuntu-22.04
 - Also update base image for debootstrap-ed sysroots
 - Switch to Ubuntu 22.04

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/10084/files
  - new: https://git.openjdk.org/jdk/pull/10084/files/072b4939..a1c078af

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10084&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10084&range=02-03

  Stats: 586 lines in 31 files changed: 444 ins; 99 del; 43 mod
  Patch: https://git.openjdk.org/jdk/pull/10084.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10084/head:pull/10084

PR: https://git.openjdk.org/jdk/pull/10084