RFR: 8324752: C2 Superword: remove SuperWordRTDepCheck

[Emanuel Peter]

Subtask of https://github.com/openjdk/jdk/pull/16620

SuperWordRTDepCheck is a debug-only flag, which detects if there are arrays in the same slice that have different bases, i.e. may be different arrays. This could be the basis for alias-analysis.

We should do aliasing-analysis properly in a future RFE ([JDK-8324751](https://bugs.openjdk.org/browse/JDK-8324751)). If we can prove (statically or with a runtime-check) that two arrays are different, then this removes edges from the dependency graph, and may allow vectorization that would otherwise not be possible.

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Commit messages:
 - 8324752

Changes: https://git.openjdk.org/jdk/pull/17585/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17585&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8324752
  Stats: 56 lines in 3 files changed: 0 ins; 55 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/17585.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17585/head:pull/17585

PR: https://git.openjdk.org/jdk/pull/17585