[llvm] [clang] [SpecialCaseList] Use glob by default (PR #74809)

[Ellis Hoag via cfe-commits]

ellishg wrote:

> Probably would be good to introduce the `-v1` version and require it first, then eventually change the default - so people don't get a silent behavior change? Even the existing users only using `*` and `.` need to change their syntax to migrate to v2, right? They'll need to change `.*` to `*` and `.` to `?` and if they don't, their matches will start behaving strangely without a specific/actionable error message?

Since `#!special-case-list-v1` is just a comment and `v1` is the default before this change, users can actually add it to the first line today and the behavior won't change until Clang 19.

https://github.com/llvm/llvm-project/pull/74809