[jdk17u] RFR: 8272970: Parallelize runtime/InvocationTests/

[Aleksey Shipilev]

Clean backport to make tests faster and prepare to potential backport of JDK-8272914.

Additional testing:
 - [x] Affected tests still pass

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Commit messages:
 - Backport 6cfe314262dacd6ca1a74c000d045b1cabd374db

Changes: https://git.openjdk.java.net/jdk17u/pull/66/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17u&pr=66&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8272970
  Stats: 263 lines in 6 files changed: 215 ins; 25 del; 23 mod
  Patch: https://git.openjdk.java.net/jdk17u/pull/66.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17u pull/66/head:pull/66

PR: https://git.openjdk.java.net/jdk17u/pull/66