Use native private members in Rush tooling - #5941

Use native private members in Rush tooling#5941

Bharat Middha (bmiddha) wants to merge 6 commits into

bmiddha/fix-no-new-null-native-privatemicrosoft/rushstack:bmiddha/fix-no-new-null-native-privatefrom

bmiddha/native-private-fields-rush-ecosystemmicrosoft/rushstack:bmiddha/native-private-fields-rush-ecosystemCopy head branch name to clipboard