Update sanitization approach of `TestInfo` properties `NameSanitized` and `SuiteNameSanitized`

[YevgeniyShunevych]

Before v3, invalid characters were just removed from a string. Now they are replaced with underscore symbol, similarly to sanitization of screenshot and snapshot file names. This mainly affects the test folder names in Artifacts directory path.

Example

Test("2/1") as Name becomes
Test(_2_1_) as NameSanitized