[clang] [clang] assert fail when number of arguments in pack exceed implement… (PR #74220)

[via cfe-commits]

wheatman wrote:

I'll change it from a assert to a diagnostic, my thought had been that it is not a fault with the program, but an issue with the compiler so figured it should be an assert.
In that case I assume it should be an error and not a warning since I don't believe a correct program could exceed the limit.

When I have the change I'll update the commit message with the new information about the new error

https://github.com/llvm/llvm-project/pull/74220