RFR: 8329201: C2: Replace TypeInterfaces::intersection_with() + eq() with contains()

[Christian Hagedorn]

This patch replaces all `TypeInterfaces::intersection_with()` + `eq()` usages with a simpler `contains()` call which does the same.

Thanks,
Christian

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Commit messages:
 - 8329201: C2: Replace TypeInterfaces::intersection_with() + eq() with contains()

Changes: https://git.openjdk.org/jdk/pull/18620/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18620&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8329201
  Stats: 8 lines in 1 file changed: 4 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/18620.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18620/head:pull/18620

PR: https://git.openjdk.org/jdk/pull/18620