RFR: 8341527: AVX-512 intrinsic for SHA3 [v8]

[Ferenc Rakoczi]

> There is already an intrinsic for SHA-3 for aarch64, which gives significant speed improvement on that architecture, so this pull request is bringing similar improvement for tha x64 family of systems that have the AVX-512 extension. Rudimentary measurements show that 30-40% speed improvement can be achieved.

Ferenc Rakoczi has updated the pull request incrementally with one additional commit since the last revision:

  added comments

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Changes:
  - all: https://git.openjdk.org/jdk/pull/21352/files
  - new: https://git.openjdk.org/jdk/pull/21352/files/e4979df2..b9cc7dba

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21352&range=07
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21352&range=06-07

  Stats: 25 lines in 1 file changed: 24 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/21352.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21352/head:pull/21352

PR: https://git.openjdk.org/jdk/pull/21352