RFR: 8338062: JFR: Remove TestStartDuration.java and TestStartName.java from ProblemList.txt

[Erik Gahlin]

Could I have a review of a change that removes two tests from ProblemList.txt. 

The parsing of startup parameters was rewritten in Java for JDK 17 as part of [JDK-8265271](https://bugs.openjdk.org/browse/JDK-8265271) and I have run the tests several thousand times without a failure. 

Thanks
Erik

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Commit messages:
 - Initial

Changes: https://git.openjdk.org/jdk/pull/20511/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20511&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8338062
  Stats: 2 lines in 1 file changed: 0 ins; 2 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/20511.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20511/head:pull/20511

PR: https://git.openjdk.org/jdk/pull/20511