badwords: add more contractions, fix fallouts

Also fix hits in autotools scripts (not to enforce).

Closes #19576

.github/scripts/badwords.txt

@@ -18,21 +18,34 @@ couldn't:could not
 didn't:did not
 doesn't:does not
 don't=do not
+haven't:have not
+i'd:I would
+i'll:I will
 i'm:I am
+i've:I have
 isn't:is not
 it'd:it would
+it'll:it will
+might've:might have
+needn't:need not
 should've:should have
+shouldn't:should not
 that's:that is
 there's:there is
 they'd:They would
 they'll:They will
 they're:They are
 they've:They have
+this'll:this will
+wasn't:was not
 we'd:we would
 we'll:we will
 we're:we are
 we've:we have
+weren't:were not
 won't:will not
+would've:would have
+wouldn't:would not
 you'd:you would
 you'll:you will
 you're:you are