Only the first did-you-mean-colon error in an object literal is reported

[sandersn]

const o = {
  x = 1,
  y = 2,
  #z: 3
}

Expected: 3 errors: Two did-you-mean-colon-not-equals error and one no-private-outside-class error.
Actual: 1 error: Just the first did-you-mean error.

The problem is that the check in checkGrammarObjectLiteralExpression concludes with return grammarErrorOnNode, whereas all the other checks don't return. The first step is to remove the return, and then make sure no other bogus errors get issued in the loop body that was previously getting skipped.