If _repr_html_ is invoked, plotly in some cases tries to open a webbrowser

[bartbroere]

When I'm trying to use plotly from Starboard Notebook (a notebook implementation that uses Pyodide as an interpreter), the _repr_html_ method crashes.

I have attached this notebook to illustrate the issue interactively

I also have some ideas on how to fix this.

1. We could no longer have the renderers fall back to opening a webbrowser, or at least be a bit more forgiving when it fails to open a webbrowser for some reason. This PR implements that solution: Be more forgiving when anything with opening a webbrowser fails #4161
2. We could instantiate the class of _repr_html_ with some parameters that it can use later. This helps make its behaviour more configurable from a notebook context. I could make a PR to achieve this.
3. We could no longer invoke self._repr_mimebundle_() in _repr_html_ here: basedatatypes.py#L804-L812. I think this would fix the issue for Starboard, but it might create problems for one of the many special cases that are in _renderers.py. This would be my third choice.

[gvwilson]

Hi - we are tidying up stale issues and PRs in Plotly's public repositories so that we can focus on things that are still important to our community. Since this one has been sitting for a while, I'm going to close it; if it is still a concern, please add a comment letting us know what recent version of our software you've checked it with so that I can reopen it and add it to our backlog. If you'd like to submit a PR, we'd be happy to prioritize a review, and if it's a request for tech support, please post in our community forum. Thank you - @gvwilson