[jdk17u-dev] RFR: 8257722: Improve "keytool -printcert -jarfile" output

[Goetz Lindenmaier]

I backport this for parity with 17.0.6-oracle.

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Commit messages:
 - Backport de93b1d0e83a9428dae4a9609996fe7b7e9b4932

Changes: https://git.openjdk.org/jdk17u-dev/pull/773/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=773&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8257722
  Stats: 253 lines in 4 files changed: 166 ins; 84 del; 3 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/773.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev pull/773/head:pull/773

PR: https://git.openjdk.org/jdk17u-dev/pull/773