[clang] [analyzer] Update the undefined assignment checker diagnostics to not use the term 'garbage' (PR #126596)

[David Tarditi via cfe-commits]

dtarditi wrote:

Thanks everyone for the reviews and feedback.

I don't have write access for LLVM.  @NagyDonat or @haoNoQ, could you merge it  on my behalf?  Do you want me to condense the change to a single commit as recommended [here](https://llvm.org/docs/GitHub.html#landing-your-change)? Alternately, I could post a draft commit message in a comment for use with GitHub's UI for a squash-merge.



https://github.com/llvm/llvm-project/pull/126596