[jdk8u] RFR: 8314960: Add Certigna Root CA - 2 [v2]

[Severin Gehwolf]

> Backport of JDK-8314960 to add new certigna root 2 certificate to OpenJDK 8u392 as a critical fix during rampdown. Patch applies cleanly after path shuffling and backporting [JDK-8295894](https://bugs.openjdk.org/browse/JDK-8295894). See #48 
> 
> Testing:
> - [x] GHA
> - [x] `jdk/test/security/infra/java/security/cert/CertPathValidator` and  `jdk/test/sun/security/lib/cacerts` jtreg tests. All pass except `AmazonCA.java` which is a different matter (it'll be OK again once JDK-8309088 is in as well).

Severin Gehwolf has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase.

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Changes:
  - all: https://git.openjdk.org/jdk8u/pull/49/files
  - new: https://git.openjdk.org/jdk8u/pull/49/files/c8e4d168..c8e4d168

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk8u&pr=49&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk8u&pr=49&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk8u/pull/49.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u.git pull/49/head:pull/49

PR: https://git.openjdk.org/jdk8u/pull/49