RFR: 7904123: Switch the Asmtools build system to use JDK 17 (LTS)

[Leonid Kuskov]

[CODETOOLS-7904123](https://bugs.openjdk.org/browse/CODETOOLS-7904123) Switch the Asmtools build system to use JDK 17 (LTS) in alignment with jtreg

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Commit messages:
 - CODETOOLS-7904123: Switch the Asmtools build system to use JDK 17 (LTS)

Changes: https://git.openjdk.org/asmtools/pull/91/files
  Webrev: https://webrevs.openjdk.org/?repo=asmtools&pr=91&range=00
  Issue: https://bugs.openjdk.org/browse/CODETOOLS-7904123
  Stats: 12 lines in 6 files changed: 1 ins; 0 del; 11 mod
  Patch: https://git.openjdk.org/asmtools/pull/91.diff
  Fetch: git fetch https://git.openjdk.org/asmtools.git pull/91/head:pull/91

PR: https://git.openjdk.org/asmtools/pull/91