RFR: 8368552: H3ErrorHandlingTest.testCloseControlStream intermittent timed out

[SendaoYan]

Hi all,

H3ErrorHandlingTest.testCloseControlStream(java/net/httpclient/http3/H3ErrorHandlingTest.java) intermittent timed out with fastdebug build on linux-x64.
This PR use Utils.adjustTimeout to receive the timeout factor from jtreg, and change the default timeout in 'triggerError' function value from 10 to 20 to make test run passed steady with fastdebug build.

I run this test 120 times simultancely all passed after this PR with fastbug build.

-------------

Commit messages:
 - 8368552: H3ErrorHandlingTest.testCloseControlStream intermittent timed out

Changes: https://git.openjdk.org/jdk/pull/27472/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27472&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8368552
  Stats: 9 lines in 1 file changed: 1 ins; 0 del; 8 mod
  Patch: https://git.openjdk.org/jdk/pull/27472.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27472/head:pull/27472

PR: https://git.openjdk.org/jdk/pull/27472