[llvm] [clang] [LLVM][IR] Replace ConstantInt's specialisation of getType() with getIntegerType(). (PR #75217)

[Paul Walker via cfe-commits]

paulwalker-arm wrote:

Just a note to say the PR is not complete because there are uses outside of clang and llvm that I need to port.

https://github.com/llvm/llvm-project/pull/75217