[clang] [llvm] [Support][Modules] Removed prepareForGetLock and its usages. Ensured parent directory exists when creating lock file. (PR #189888)

[Aadarsh Keshri via cfe-commits]

Aadarsh-Keshri wrote:

@jansvoboda11 Could you also please merge it? I'm a new contributor.

https://github.com/llvm/llvm-project/pull/189888