[jdk17u-ri] RFR: 8285497: Add system property for Java SE specification maintenance version

[Justin Lu]

Please review this PR which is a backport of adding the "java.specification.maintenance.version" system property.
The property is initialized with a value of 1, which corresponds with the Java SE 17 Maintenance Release 1.

Note that the only change in this backport is the uncommenting of the system property in `VersionProps.java.template`. And as such, the copyright year is updated to 2024, not the original backport year.

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Commit messages:
 - init

Changes: https://git.openjdk.org/jdk17u-ri/pull/2/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-ri&pr=2&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8285497
  Stats: 22 lines in 4 files changed: 19 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk17u-ri/pull/2.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-ri.git pull/2/head:pull/2

PR: https://git.openjdk.org/jdk17u-ri/pull/2