Move NOLINT comment to first line of assignment operator declaration

[HighCommander4]

Fixes https://github.com/google/googletest/issues/4110

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[asoffer]

Hey! looks like we still need you to sign the CLA. Please let me know when that's been done.

[HighCommander4]

Based on https://github.com/google/googletest/issues/4110#issuecomment-1376290123, it sounds like this patch wouldn't be accepted anyways, so I should probably close this.