Rename fetchLinkSuggestions

[akirk]

Fixes the breaking Gutenberg change WordPress/gutenberg#40052, see also Automattic/blocks-everywhere#25

Description

__experimentalFetchLinkSuggestions is being renamed to fetchLinkSuggestions

Solution

I've renamed the function call which was already written in a defensive matter. I've changed the code so that it falls back to a potentially existing __experimentalFetchLinkSuggestions but maybe this is not necessary. I haven't seen this being called anywhere in the codebase.

cc @getdave

[getdave]

This looks good. Being defensive is probably wise.

Based on feedback, I think we'll probably end up putting in a formal deprecation in Gutenberg when we change the API but who knows.

Thanks for being proactive here 👏

[johngodley]

Thanks Alex!