[jdk21u-dev] RFR: 8331391: Enhance the keytool code by invoking the buildTrustedCerts method for essential options

[Goetz Lindenmaier]

I backport this for parity with 21.0.6-oracle.

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Commit messages:
 - Backport c9bee173d61f4accfc4adc280ab5d21600191756

Changes: https://git.openjdk.org/jdk21u-dev/pull/1009/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1009&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8331391
  Stats: 2 lines in 1 file changed: 1 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1009.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1009/head:pull/1009

PR: https://git.openjdk.org/jdk21u-dev/pull/1009