[jdk25u] RFR: 8325766: Extend CertificateBuilder to create trust and end entity certificates programmatically

[Deepak Damodaran]

Almost clean except one extra import statement at line no 44.

Mach5 runs:
- https://mach5.us.oracle.com/mdash/jobs/ddamoadr-adhoc-20251002-0918-35284814 (Impacted area)
- https://mach5.us.oracle.com/mdash/jobs/ddamoadr-adhoc-20251002-0954-35286208 (Tiers 1-5)

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

Commit messages:
 - Backport 31847149c1956b23c19a99309982660b4bbdd2d6
 - Backport 31847149c1956b23c19a99309982660b4bbdd2d6

Changes: https://git.openjdk.org/jdk25u/pull/263/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk25u&pr=263&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8325766
  Stats: 772 lines in 3 files changed: 164 ins; 565 del; 43 mod
  Patch: https://git.openjdk.org/jdk25u/pull/263.diff
  Fetch: git fetch https://git.openjdk.org/jdk25u.git pull/263/head:pull/263

PR: https://git.openjdk.org/jdk25u/pull/263