[jdk21u-dev] RFR: 8328367: Convert java/awt/Component/UpdatingBootTime test to main

[Goetz Lindenmaier]

I backport this for parity with 21.0.9-oracle

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Commit messages:
 - Backport 03c25b15eb73e594d1329be397cd34e206d2682b

Changes: https://git.openjdk.org/jdk21u-dev/pull/2046/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2046&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8328367
  Stats: 363 lines in 3 files changed: 98 ins; 265 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2046.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2046/head:pull/2046

PR: https://git.openjdk.org/jdk21u-dev/pull/2046