[clang-tidy] bugprone-infinite-loop: Fix false positives with volatile addresses.

Low-level code may occasionally deal with direct access by concrete addresses
such as 0x1234. Values at these addresses act like globals: they can change
at any time. They typically wear volatile qualifiers.

Suppress all warnings on loops with conditions that involve casting anything to
a pointer-to-...-pointer-to-volatile type.

The closely related bugprone-redundant-branch-condition check
doesn't seem to be affected. Add a test just in case.

Differential Revision: https://reviews.llvm.org/D108808