[jdk11u-dev] RFR: 8339560: Unaddressed comments during code review of JDK-8337664

[Antonio Vieiro]

Clean backport of [JDK-8339560](https://bugs.openjdk.org/browse/JDK-8339560) that improves `Distrust.java` and reorganizes the directories of distrusted certificates. 

It will prove useful in order to ease the review of future backports such as upcoming [JDK-8346587](https://bugs.openjdk.org/browse/JDK-8346587) for next april 2025.

Tested with tier1 tests in Linux...


==============================
Test summary
==============================
   TEST                                              TOTAL  PASS  FAIL ERROR   
   jtreg:test/hotspot/jtreg:tier1                     1497  1497     0     0   
   jtreg:test/jdk:tier1                               1899  1899     0     0   
   jtreg:test/langtools:tier1                         3941  3941     0     0   
   jtreg:test/nashorn:tier1                              0     0     0     0   
   jtreg:test/jaxp:tier1                                 0     0     0     0   
==============================
TEST SUCCESS


... and with the `jdk/sun/security` tests too.


==============================
Test summary
==============================
   TEST                                              TOTAL  PASS  FAIL ERROR   
   jtreg:test/jdk/sun/security                         656   656     0     0   
==============================
TEST SUCCESS

-------------

Commit messages:
 - Backport 6a3f208c0b32d90eb3853008301e680695d3ac28

Changes: https://git.openjdk.org/jdk11u-dev/pull/2993/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2993&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8339560
  Stats: 932 lines in 26 files changed: 391 ins; 541 del; 0 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2993.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2993/head:pull/2993

PR: https://git.openjdk.org/jdk11u-dev/pull/2993