RFR: 8314960: Add Certigna Root CA - 2

[Rajan Halade]

This PR is to add two new TLS root certificates from Certigna (Dhimyotis). This CA has gone through https://www.oracle.com/java/technologies/javase/carootcertsprogram.html process.

The release-note is at [JDK-8314976](https://bugs.openjdk.org/browse/JDK-8314976)

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Commit messages:
 - 8314960: Add Certigna Root CA - 2

Changes: https://git.openjdk.org/jdk/pull/15425/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15425&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8314960
  Stats: 568 lines in 4 files changed: 338 ins; 227 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/15425.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15425/head:pull/15425

PR: https://git.openjdk.org/jdk/pull/15425