Fix RISC-V JIT build

[amanasifkhalid]

Fixes #117550.

@dotnet/jit-contrib PTAL.

[Copilot]

Pull Request Overview

This PR fixes a build warning on the RISC-V JIT backend by ensuring the address-offset comparison uses matching types.

• Casts the offset to UNATIVE_OFFSET before comparing to emitDataSize()
• Preserves existing logic and assertions

[risc-vv]

@dotnet/samsung Could you please take a look? These changes may be related to riscv64.

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[risc-vv]

RISC-V Release-CLR-VF2: 9083 / 9113 (99.67%)

=======================
      passed: 9083
      failed: 2
     skipped: 597
      killed: 28
------------------------
 TOTAL tests: 9710
VIRTUAL time: 11h 13min 21s 912ms
   REAL time: 45min 40s 887ms
=======================

report.xml, report.md, failures.xml, testclr_details.tar.zst

RISC-V Release-FX-QEMU: 284027 / 285104 (99.62%)

=======================
      passed: 284027
      failed: 1072
     skipped: 39
      killed: 5
------------------------
 TOTAL tests: 285143
VIRTUAL time: 30h 42min 55s 8ms
   REAL time: 1h 12min 11s 902ms
=======================

report.xml, report.md, failures.xml, testclr_details.tar.zst

RISC-V Release-CLR-QEMU: 9082 / 9112 (99.67%)

=======================
      passed: 9082
      failed: 2
     skipped: 597
      killed: 28
------------------------
 TOTAL tests: 9709
VIRTUAL time: 37h 28min 17s 967ms
   REAL time: 38min 16s 886ms
=======================

report.xml, report.md, failures.xml, testclr_details.tar.zst

RISC-V Release-FX-VF2: 308188 / 309925 (99.44%)

=======================
      passed: 308188
      failed: 1729
     skipped: 39
      killed: 8
------------------------
 TOTAL tests: 309964
VIRTUAL time: 21h 24min 56s 333ms
   REAL time: 2h 18min 20s 14ms
=======================

report.xml, report.md, failures.xml, testclr_details.tar.zst

Build information and commands

GIT: b795a84ce65bba25de0f4cb51a2af1a121c9e76e
CI: d6c9c1ab3a7411819463edc05ded301e89ba586a
REPO: dotnet/runtime
BRANCH: main
CONFIG: Release
LIB_CONFIG: Release