[riscv-port] RFR: 8280116: riscv: RVB: Add rest instructions of zba, zbb, and bitwise rotation

[Feilong Jiang]

This PR has the following changes:
1. Implement rest instructions of zba, zbb and bitwise rotation sub-extension
2. Add non-rvb version of AbsI/AbsL

New C2 instructions are covered by the JTREG tests hotspot:tier1

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Commit messages:
 - 8280116: riscv: RVB: Add rest instructions of zba, zbb, and bitwise rotation

Changes: https://git.openjdk.java.net/riscv-port/pull/47/files
 Webrev: https://webrevs.openjdk.java.net/?repo=riscv-port&pr=47&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8280116
  Stats: 180 lines in 3 files changed: 179 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/riscv-port/pull/47.diff
  Fetch: git fetch https://git.openjdk.java.net/riscv-port pull/47/head:pull/47

PR: https://git.openjdk.java.net/riscv-port/pull/47