[SpecialCaseList] Add option to use Globs instead of Regex to match patterns

Add an option in `SpecialCaseList` to use Globs instead of Regex to match patterns. `GlobPattern` was extended in https://reviews.llvm.org/D153587 to support brace expansions which allows us to use patterns like `*/src/foo.{c,cpp}`. It turns out that most patterns only take advantage of `*` so using Regex was overkill and required lots of escaping in practice. This often led to bugs due to forgetting to escape special characters.

Since this would be a breaking change, we temporarily support Regex by default and use Globs when `#!special-case-list-v2` is the first line in the file. Users should switch to the glob format described in https://llvm.org/doxygen/classllvm_1_1GlobPattern.html. For example, `(abc|def)` should become `{abc,def}`.

See discussion in https://reviews.llvm.org/D152762 and https://discourse.llvm.org/t/use-glob-instead-of-regex-for-specialcaselists/71666.

Reviewed By: MaskRay

Differential Revision: https://reviews.llvm.org/D154014

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