[jdk21u-dev] RFR: 8291809: Convert compiler/c2/cr7200264/TestSSE2IntVect.java to IR verification test

[Andrew Lu]

I backport this for parity with 21.0.5-oracle.

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Commit messages:
 - Backport 4da28b40f04acc355d86d44cb8d9fa0c5c7829bd

Changes: https://git.openjdk.org/jdk21u-dev/pull/879/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=879&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8291809
  Stats: 1184 lines in 4 files changed: 408 ins; 322 del; 454 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/879.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/879/head:pull/879

PR: https://git.openjdk.org/jdk21u-dev/pull/879