[clang] [CIR] Implement PromotableRegionOpInterface for `cir.if`,`cir.scope` and `cir.ternary` (PR #215780)

[Bruno Cardoso Lopes via cfe-commits]

https://github.com/bcardosolopes approved this pull request.

LGTM, nothing else to add - thanks for adding the ternary.

https://github.com/llvm/llvm-project/pull/215780