RFR: 8318219: RISC-V: C2 ExpandBits

[Hamlin Li]

Hi,
Can you review the change to add intrinsic for ExpandBits for Long & Integer?
Thanks!

related to: https://github.com/openjdk/jdk/pull/16481

## Test
### jtreg
test/jdk/java/lang/CompressExpand*.java
test/hotspot/jtreg/compiler/intrinsics/TestBitShuffleOpers.java
test/hotspot/jtreg/compiler/intrinsics/

### gtest
test/hotspot/gtest/opto/test_compress_expand_bits.cpp

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Commit messages:
 - enable TestBitShuffleOpers.java
 - Initial commit

Changes: https://git.openjdk.org/jdk/pull/16658/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16658&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8318219
  Stats: 165 lines in 5 files changed: 162 ins; 2 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/16658.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16658/head:pull/16658

PR: https://git.openjdk.org/jdk/pull/16658