Describe the bug
Use of underscores in test case names (e.g. TEST(DateTimeTransformer, Past_1976_Nov_17__12_27_04)) in googletest is not recommended, since it has a few gotchas (https://github.com/google/googletest/blob/master/googletest/docs/faq.md#why-should-test-suite-names-and-test-names-not-contain-underscore). Furthermore, some tests (such as TEST(DateTimeTransformer, Past_1976_Nov_17__12_27_04)) have double underscores, which are reserved to be used by the compiler and standard library. It's not a big issue and unlikely to break, but it's not standards conforming and, quoting googletest's docs:

If you violate the rule, there may not be immediate consequences, but your test may (just may) break with a new compiler (or a new version of the compiler you are using) or with a new version of googletest. Therefore it's best to follow the rule.

Urgency
N/A

System information
N/A

To Reproduce
Files such as onnxruntime\test\automl_ops\datetimetransformer_test.cc have a bunch of underscores in test names.