RFR: Add unique ticket number for each disabled test

[William Kemper]

Also, place `java/lang/Thread/virtual/TraceVirtualThreadLocals.java` in the correct `ProblemList.txt` file.

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Commit messages:
 - Add unique ticket number for each disabled test

Changes: https://git.openjdk.org/shenandoah/pull/261/files
 Webrev: https://webrevs.openjdk.org/?repo=shenandoah&pr=261&range=00
  Stats: 11 lines in 2 files changed: 1 ins; 1 del; 9 mod
  Patch: https://git.openjdk.org/shenandoah/pull/261.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah.git pull/261/head:pull/261

PR: https://git.openjdk.org/shenandoah/pull/261