RFR: 8333867: SHA3 performance can be improved [v2]

[Ferenc Rakoczi]

> This PR removes some unnecessary conversions between byte arrays and long arrays during SHA3 digest computations.

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

  Fix clone(), accept review suggestions.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/19632/files
  - new: https://git.openjdk.org/jdk/pull/19632/files/873164ad..0a9f9624

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19632&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19632&range=00-01

  Stats: 34 lines in 1 file changed: 23 ins; 4 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/19632.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19632/head:pull/19632

PR: https://git.openjdk.org/jdk/pull/19632