[resize-observer-1] Turn ResizeObserver loop limit exceeded error into warning

[rhuanbarreto]

Following up the discussion in WICG/resize-observer#38, they say that the error is benign, so it shouldn't trigger an error but a warning.

[AoDev]

This error has eaten our entire quota of event reporting in sentry.io (bug report service) after a couple of days of integration. Throwing this as an error is causing financial cost and missing opportunities to fix real bugs.

[just-boris]

What are the next steps to move this forward?

As more devs are starting using ResizeObserver, it makes them spend a lot of time figuring out what is going on until they find this issue and realize that their code is working fine.

[hilts-vaughan]

I left some thoughts here: #5488 (comment)

This is overwhelming taking over the web dev. world and folks are mostly just ignoring it. Sometimes for legitimate reasons, sometimes not.

#6173 attempts to describe ways to give levers as well so that developers can at least silence this on their own if they know it's right.