RFR: 8321597: Use .template consistently for files treated as templates by the build

[Magnus Ihse Bursie]

Some files are used as "templates" in the build, that is, they are almost, but not fully, in the intended state. Instead, they have some pattern markers that need to be replaced with actual content as part of the build.

As a convention, most such files are named as `<resulting name>.template`, e.g. `VersionProps.java.template`, to indicate that this is almost, but not fully, a Java file.

A few files were created before this convention was fully embraced. These should be renamed to match the pattern.

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Commit messages:
 - Merge branch 'master' into template-rename
 - 8321597: Use .template consistently for files treated as templates by the build

Changes: https://git.openjdk.org/jdk/pull/17033/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17033&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8321597
  Stats: 11 lines in 16 files changed: 0 ins; 0 del; 11 mod
  Patch: https://git.openjdk.org/jdk/pull/17033.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17033/head:pull/17033

PR: https://git.openjdk.org/jdk/pull/17033