[jdk20u] RFR: 8306658: GHA: MSVC installation could be optional since it might already be pre-installed

Mon Apr 24 16:26:51 UTC 2023

Hi all,

This pull request contains a backport of [JDK-8306658](https://bugs.openjdk.org/browse/JDK-8306658), commit [d980cb48](https://github.com/openjdk/jdk/commit/d980cb48793f2bb662aece545fb00724c12a5613) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

The commit being backported was authored by Christoph Langer on 24 Apr 2023 and was reviewed by Aleksey Shipilev and Goetz Lindenmaier.

Thanks!

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Commit messages:
 - Backport d980cb48793f2bb662aece545fb00724c12a5613

Changes: https://git.openjdk.org/jdk20u/pull/59/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk20u&pr=59&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8306658
  Stats: 14 lines in 1 file changed: 14 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk20u/pull/59.diff
  Fetch: git fetch https://git.openjdk.org/jdk20u.git pull/59/head:pull/59

PR: https://git.openjdk.org/jdk20u/pull/59