Perf: Don't cache ItemData.EnumerateMetadata pointer#11977

SimaTian merged 1 commit intodotnet:maindotnet/msbuild:mainfrom

ccastanedaucf:dev/chcasta/perf-itemdata-enumeratefuncccastanedaucf/msbuild:dev/chcasta/perf-itemdata-enumeratefuncCopy head branch name to clipboard