RFR: 8282944: GHA: Add Alpine Linux x86_64 pre-integration check [v8]

[George Adams]

> Adds Alpine build CI job to the GitHub actions matrix. Currently this only builds hotspot. I can add tests too if people think that would be useful but for now I've left it as just build.

George Adams has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 10 commits:

 - Merge branch 'master' into alpine
 - skip gtest and jtreg
 - add Java 17 for jtreg
 - add wget
 - fix order of tasks
 - fix alpine skip
 - force grep newline
 - fix test bundle
 - add make-target: 'hotspot'
 - 8282944: GHA: Add Alpine Linux x86_64 pre-integration check

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Changes: https://git.openjdk.org/jdk/pull/20577/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20577&range=07
  Stats: 132 lines in 4 files changed: 130 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/20577.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20577/head:pull/20577

PR: https://git.openjdk.org/jdk/pull/20577