[jdk17u-dev] RFR: 8295714: GHA ::set-output is deprecated and will be removed

Tue Nov 1 22:50:45 UTC 2022

This backport fixes warnings generated in GHA summary page by use of deprecated  `set-output` command. According to warning messages command will be removed soon:

The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/`

Clean backport, all tests passed (no warnings).

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Commit messages:
 - Backport b35922be6de7b848a2982d6a278dbd205fc39e6a

Changes: https://git.openjdk.org/jdk17u-dev/pull/852/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=852&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8295714
  Stats: 28 lines in 11 files changed: 1 ins; 0 del; 27 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/852.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev pull/852/head:pull/852

PR: https://git.openjdk.org/jdk17u-dev/pull/852