Remove gtest_skip on Valgrind for FunctionReflectionTest.DestructArray

[mcbarton]

Description

Please include a summary of changes, motivation and context for this PR.

If #710 made Valgrind happy, then the gtest skip when running on Valgrind should be able to be removed.

Fixes # (issue)

Type of change

Please tick all options which are relevant.

• Bug fix
• New feature
• Requires documentation updates

Testing

Please describe the test(s) that you added and ran to verify your changes.

Checklist

• I have read the contribution guide recently

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.46%. Comparing base (4515087) to head (e29ffa8).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #714   +/-   ##
=======================================
  Coverage   81.46%   81.46%           
=======================================
  Files           9        9           
  Lines        4213     4213           
=======================================
  Hits         3432     3432           
  Misses        781      781           

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