[clang-tidy] Fix bugprone-terminating-continue when continue appears inside a switch

Don't emit a warning if the `continue` appears in a switch context as changing it to `break` will break out of the switch rather than a do loop containing the switch.
Fixes https://llvm.org/PR49492.

Reviewed By: aaron.ballman

Differential Revision: https://reviews.llvm.org/D98338