[jdk20] RFR: 8298592: Add java man page documentation for ChaCha20 and Poly1305 intrinsics

[Jamil Nimeh]

This adds documentation to the `java(1)` man page for new ChaCha20 and Poly1305 intrinsics, highlighting the diagnostic flags that were delivered in those feature enhancements.  This is similar to what has already been done for AES and GHASH diagnostic flags.

- JBS: https://bugs.openjdk.org/browse/JDK-8298592
- Flags were delivered in ( openjdk/jdk#7702 for ChaCha20 and openjdk/jdk#10582 for Poly1305, with a minor change to the Poly1305 flag name in #49 )

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Commit messages:
 - 8298592: Add java man page documentation for ChaCha20 and Poly1305 intrinsics

Changes: https://git.openjdk.org/jdk20/pull/78/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk20&pr=78&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8298592
  Stats: 16 lines in 1 file changed: 16 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk20/pull/78.diff
  Fetch: git fetch https://git.openjdk.org/jdk20 pull/78/head:pull/78

PR: https://git.openjdk.org/jdk20/pull/78