[riscv-port-jdk11u:riscv-port] RFR: 8294086: RISC-V: Cleanup InstructionMark usages in the backend

[Fei Yang]

On Fri, 11 Oct 2024 03:30:15 GMT, Dingli Zhang <dzhang at openjdk.org> wrote:

> Hi all, 
> 
> Please review this backport to riscv-port-jdk11u.
> 
> Backport of [JDK-8294086](https://bugs.openjdk.org/browse/JDK-8294086).
> 
> The original patch cannot be directly applied because changes of `MacroAssembler::read_polling_page` and  `macroAssembler_riscv.hpp` have been modified.
> 
> Testing:
> - Tier1 passed without new failure on lp4a (release).

Marked as reviewed by fyang (Lead).

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PR Review: https://git.openjdk.org/riscv-port-jdk11u/pull/38#pullrequestreview-2362083708