[llvm] [llvm] Don't flush llvm::raw_string_ostream (NFC) (PR #110754)

[Youngsuk Kim via llvm-commits]

JOE1994 wrote:

> we kind of settled on not changing the buffering behavior of the existing classes, but instead introduce new, buffered classes that are more performant. This means replacing uses of the raw_{string,svector}_ostream with buffered equivalent that needs flushing.

Given the context, I'll close this PR. Thanks!

https://github.com/llvm/llvm-project/pull/110754