RFR: 8366775: TestCompileTaskTimeout should use timeoutFactor

[Manuel Hässig]

`TestCompileTaskTimeout.java` employs a timeout to test that methods compiled faster than a specified `CompileTaskTimeout`. However, it does not make use of the jtreg timeout factor, which lead to #26963 increasing the timeout to 2 s. This PR remedies this, by using the timeout factor and reducing the default timeout to 500 ms.

Testing:
 - [ ] Github Actions
 - [ ] tier1, tier2 linux-x64-debug, linux-x64, linux-aarch64-debug, linux-aarch64

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Commit messages:
 - Use timeuot factor

Changes: https://git.openjdk.org/jdk/pull/27094/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27094&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8366775
  Stats: 7 lines in 1 file changed: 6 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/27094.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27094/head:pull/27094

PR: https://git.openjdk.org/jdk/pull/27094