[clang] [clang-tools-extra] [Sema][clangd] add noexcept to override functions during code completion (PR #75937)

[Younan Zhang via cfe-commits]

zyn0217 wrote:

> ...which is called during code completion to generate the override function declarator based on the FunctionDecl of the virtual function in the base.

The place you're patching is not only specific to "completing override functions", but handles all completion strings involving function declarations.

https://github.com/llvm/llvm-project/pull/75937