[clang-tidy] IncludeInserter: allow <> in header name

This adds a pair of overloads for create(MainFile)?IncludeInsertion methods that
use the presence of the <> in the file name to control whether the #include
directive will use angle brackets or quotes. Motivating examples:
https://reviews.llvm.org/D82089#inline-789412 and
https://github.com/llvm/llvm-project/blob/master/clang-tools-extra/clang-tidy/modernize/MakeSmartPtrCheck.cpp#L433

The overloads with the IsAngled parameter can be removed after the users are
updated.

Update usages of createIncludeInsertion.

Update (almost all) usages of createMainFileIncludeInsertion.

Reviewed By: hokein

Differential Revision: https://reviews.llvm.org/D85666