Improve `SyntaxError` suggestions for common operator typos and cross-language mistakes

[Aniketsy]

As I proposed in #151129 (comment), we can also add suggestions for <> ("not equal" in Pascal and Python 2), "=<", "=>" and "=!" (typo in "<=", ">=" and "!="), "===" ("is" in JavaScript and PHP).

suggested by @serhiy-storchaka

"===" ("is" in JavaScript and PHP).
And Mathematica.

follow up #150906

I'll submit a PR for this . shortly