add Array.prototype.filter signature with type guard

[maiermic]

see #7657

[msftclas]

Hi @maiermic, I'm your friendly neighborhood Microsoft Pull Request Bot (You can call me MSBOT). Thanks for your contribution!
You've already signed the contribution license agreement. Thanks!
We will now validate the agreement and then real humans will evaluate your PR.

TTYL, MSBOT;

[mhegazy]

thanks @maiermic! and sorry for the delay.

[Arnavion]

This only adds it to ReadOnlyArray though. Also need it for regular Array.