RFR: 8372461: [IR Framework] Multiple test failures after JDK-8371789

[Christian Hagedorn]

[JDK-8371789](https://bugs.openjdk.org/browse/JDK-8371789) improved the C2 type dumps but unfortunately also broke some IR Framework internal tests and some regexes:

- `TestIRMatching.java`: Forgot to update old reference to "precise". Replaced with "Constant".
- `IRNode.CHECKCAST_ARRAY*`: Forgot to update old reference to "precise". Replaced with `Constant` and added `aryklassptr`.
- Some clean-up to `LOAD_STORE_PREFIX` was incorrect since we no longer match various combinations tested with `TestIRMatching.java` and `TestPhaseIRMatching.java`. For example:
https://github.com/openjdk/jdk/blob/67ef81eb78b28e5dcdf91785b476dfd0858cbd16/test/hotspot/jtreg/testlibrary_tests/ir_framework/tests/TestPhaseIRMatching.java#L766-L783
I reverted the no-longer matching part of the regex back to what we had before JDK-8371789.

#### Testing
- [X] Tier1
- [X] Tier5 with IR framework internal tests only
- [ ] Additionally testing `TestIRMatching.java` and `TestPhaseIRMatching.java` on arm, aarch64, ppc64le, ppc64be s390, and riscv64 (thanks to  @mhaessig for taking care of that!)

Thanks,
Christian

-------------

Commit messages:
 - 8372461: [IR Framework] Multiple test failures after JDK-8371789

Changes: https://git.openjdk.org/jdk/pull/28495/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28495&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8372461
  Stats: 8 lines in 2 files changed: 0 ins; 1 del; 7 mod
  Patch: https://git.openjdk.org/jdk/pull/28495.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28495/head:pull/28495

PR: https://git.openjdk.org/jdk/pull/28495