Add runAndValidate() to wrap scheduleAndRun() and testValidate() pattern

[tbqh]

Implements recommendation from #3020. Adds runAndValidate() to wrap the scheduleAndRun() and testValidate() pattern that is common in many tests.

IMO I'm not a huge fan of this change. There is a lot of variety in the way scheduleAndRun() and testValidate() are called. scheduleAndRun() has a default argument, and testValidate() has 3 overloads, some of which also have default arguments. I opted not to add any overloads for runAndValidate(), which means that there's plenty of cases where it can't be used. I think it was a little confusing the number of patterns we had before, and this PR makes it worse by adding another one.

And due to 80col limit, this PR is more verbose in some cases.

[github-actions]

Description

• Introduce runAndValidate utility function

• Replace scheduleAndRun and testValidate calls

• Simplify test validation across multiple files

• Improve code consistency and maintainability

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Changes walkthrough 📝

Relevant files

Enhancement

9 files test_gpu2.cpp Replace scheduleAndRun and testValidate with runAndValidate +16/-20  test_gpu3.cpp Replace scheduleAndRun and testValidate with runAndValidate +4/-6      test_indexing_advanced.cpp Replace scheduleAndRun and testValidate with runAndValidate +4/-6      test_pointwise.cpp Replace scheduleAndRun and testValidate with runAndValidate +12/-14  test_reshape.cpp Replace scheduleAndRun and testValidate with runAndValidate +22/-33  test_resize.cpp Replace scheduleAndRun and testValidate with runAndValidate +9/-17    test_transpose.cpp Replace scheduleAndRun and testValidate with runAndValidate +26/-31  utils.cpp Add runAndValidate utility function implementation              +12/-0    utils.h Declare runAndValidate utility function                                    +7/-0

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[naoyam]

!test

[naoyam]

LGTM.

I'm not that worried about the multiple overloaded versions as these are only test utilities.