RFR: 8369456: [TESTBUG] Fix the test failure of TestSelectFromTwoVectorOp.java on sve2 platforms [v4]

[erifan]

> According the AD file, partial cases where `vector_length_in_bytes > 8` of the vector API `selectFrom` are not supported on the AArch64 SVE2 platform. But the test `TestSelectFromTwoVectorOp.java` didn't rule out these cases, leading to test faiulres on sve2 plaftforms where `MaxVectorSize > 16`.
> 
> This test problem was discovered by simulating a 512-bit sve2 environment using qemu.
> 
> This PR fixes these test failures.

erifan has updated the pull request incrementally with one additional commit since the last revision:

  Add IR test rules for unsupported partial cases on aarch64

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Changes:
  - all: https://git.openjdk.org/jdk/pull/27723/files
  - new: https://git.openjdk.org/jdk/pull/27723/files/146ce68f..3147164f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=27723&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=27723&range=02-03

  Stats: 54 lines in 1 file changed: 54 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/27723.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27723/head:pull/27723

PR: https://git.openjdk.org/jdk/pull/27723