Autolabel library PRs with T-libs #95986
                
     Merged
            
            
          
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Continuation of rust-lang/highfive#389
We're trying to improve the libs team review structure and part of that is defaulting PRs to the T-libs team to act as a mini-triage team for all the libs teams / project groups. Highfive doesn't do issue tagging so we will rely on triagebot to pre-triage for t-libs to post-triage :)