This was a tricky one.
Fixes https://github.com/payloadcms/payload/issues/10700
May potentially fix 9163
This could have also been causing glitchyness related to things like
lexical upload / relationship / link node population.
## Issue and solution explained
The lexical field afterRead hook is responsible for executing afterRead
hooks (this includes relationship population) for all sub-nodes, e.g.
upload or block nodes.
Any field and population promises that were created in the process of
traversing the lexical editor state were added to the parent
`fieldPromises` and `populationPromises` array.
Now this lexical `afterRead` hook, which is responsible for creating and
adding all field and population promises of its sub-nodes to the parent
`fieldPromises` and `populationPromises` arrays, was itself part of the
**same** `fieldPromises` array.
The execution of this lexical `afterRead` hook itself is happening while
the `fieldPromises` array is being awaited. This means that new field
and population promises were being added to this same array DURING the
process of awaiting all promises of this array.
As a result, any promises dynamically added while awaiting the initial
set of fieldPromises were not included in the initial `Promise.all()`
awaiting process, leading to unhandled promises.
This PR resolves the issue by ensuring that promises are repeatedly
awaited until no new promises remain in the arrays. By continuously
awaiting the `fieldPromises` and `populationPromises` until all
dynamically added promises are fully resolved, this PR ensures that any
promises added during the processing of a parent promise are also
properly awaited. This guarantees that no promises are skipped,
preserving the intended behavior of the afterRead hook
9f2bca104b