RFR: 8374910: Use of containsTypeEquivalent in array type equality test seems bogus

[Vicente Romero]

As discussed in the JIRA entry for the bug, using `Types::containsTypeEquivalent` to determine the equality or not of two array types is probably an indirection; as invoking this method would make sense if the types being compared could contain wildcards which is not allowed for arrays. This PR fixes this minor issue. The previous code is also correct only that it would resort anyways to a type equality comparison,

TIA

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Commit messages:
 - 8374910: Use of containsTypeEquivalent in array type equality test seems bogus

Changes: https://git.openjdk.org/jdk/pull/29867/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=29867&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8374910
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/29867.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29867/head:pull/29867

PR: https://git.openjdk.org/jdk/pull/29867