Rollup merge of #105769 - lyming2007:issue-105177-fix, r=eholk

add function to tell the identical errors for ambiguity_errors

if 2 errors of the kind and ident and span of the ident, b1, b2 and misc1 misc2 are the same we call these 2 ambiguity errors identical
prevent identical ambiguity error from pushing into vector of ambiguity_errors this will fix #105177

diff --cc compiler/rustc_resolve/src/lib.rs
Simple merge