[riscv-port-jdk17u:riscv-port] RFR: 8295110: RISC-V: Mark out relocations as incompressible

[Xiaolin Zheng]

Backport `8295110: RISC-V: Mark out relocations as incompressible`.

A little conflict is that we do not have the refactoring `8295270: RISC-V: Clean up and refactoring for assembler functions` on 17u.

Tested along with remaining patches, hotspot tier1~4 with fastdebug build.

-------------

Commit messages:
 - 8295110: RISC-V: Mark out relocations as incompressible

Changes: https://git.openjdk.org/riscv-port-jdk17u/pull/29/files
 Webrev: https://webrevs.openjdk.org/?repo=riscv-port-jdk17u&pr=29&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8295110
  Stats: 310 lines in 13 files changed: 144 ins; 3 del; 163 mod
  Patch: https://git.openjdk.org/riscv-port-jdk17u/pull/29.diff
  Fetch: git fetch https://git.openjdk.org/riscv-port-jdk17u.git pull/29/head:pull/29

PR: https://git.openjdk.org/riscv-port-jdk17u/pull/29