[jdk17u-dev] RFR: 8342988: GHA: Build JTReg in single step

Thu Feb 6 14:20:56 UTC 2025

I want to backport this to reduce errors in gha runs.  The backport is based on the commit to 21.

I had to resolve becasue 8297984: Turn on warnings as errors for javadoc
is not in 17.
Omitted the edits in the code added by JDK-8297984.

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Commit messages:
 - Add missing file
 - Backport 6e6f8b2f90e362ceb2d76e791cd6e58cf5d3ddbd

Changes: https://git.openjdk.org/jdk17u-dev/pull/3264/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3264&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8342988
  Stats: 136 lines in 3 files changed: 81 ins; 26 del; 29 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3264.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3264/head:pull/3264

PR: https://git.openjdk.org/jdk17u-dev/pull/3264