RFR: 8293107: GHA: Bump to Ubuntu 22.04 [v3]

[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 incrementally with one additional commit since the last revision:

  Also update base image for debootstrap-ed sysroots

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/10084/files
  - new: https://git.openjdk.org/jdk/pull/10084/files/6ea8dd8b..072b4939

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10084&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10084&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 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