RFR: 8348263: C2 SuperWord: TestMemorySegment.java has failing IR rules with AlignVector after JDK-8343685

[Emanuel Peter]

In [JDK-8343685](https://bugs.openjdk.org/browse/JDK-8343685) / https://git.openjdk.org/jdk/pull/21926 I enabled some IR rules, but forgot to test with `-XX:+AlignVector`. Now those rules fail and need a corresponding `applyIf`.

Additionally, I now enabled 2 more IR rules that I forgot to enable in https://git.openjdk.org/jdk/pull/21926.

To ensure we automatically run this test with  `-XX:+AlignVector`, I added some additional runs. I already did a similar thing with other tests that have IR rules that are sensitive to `AlignVector`.

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Commit messages:
 - JDK-8348263

Changes: https://git.openjdk.org/jdk/pull/23229/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23229&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8348263
  Stats: 53 lines in 1 file changed: 37 ins; 4 del; 12 mod
  Patch: https://git.openjdk.org/jdk/pull/23229.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23229/head:pull/23229

PR: https://git.openjdk.org/jdk/pull/23229