[RFR] Convert GET_MANY accumulate saga to hooks

[fzaninotto]

Using a hook in ReferenceField allows to handle corner cases that were impossible to deal with using sagas. Most notably, ReferenceField now works properly when the dataProvider fails or returns nothing for the GET_MANY call.

This is mostly a refactoring with few visible changes for the end user, labeled 'NEW' below.

• Create useGetMany hook based on crudGetManyAccumulate action logic
• Add unit test for useGetMany
• Use the new hook in useReference
• NEW Hide loader in <ReferenceField> if the dataProvider call fails or returns nothing
• NEW Display an error icon in <ReferenceField> if the dataProvider fails
• Use the new hook in useReferenceArrayFieldController
• Use the new hook in ReferenceArrayInputController (too long, to be done in another PR)
• Fix tests

Closes #3552, #3451, #2388, #854.

To be done in another PR:

• Create useGetMatching hook based on crudGetMatchingAccumulate action logic
• Add unit test for useGetMatching
• Use the new hook in ReferenceInput, ReferenceArrayInput, SelectArrayInput and SelectInput
• Deprecate accumulate saga

This change is backwards compatible with the accumulate saga, i.e. dispatching crudGetManyAccumulate actions still works with the saga. The new useGetMany hook does not dispatch such actions.

[fzaninotto]

Switching to RFR

[fzaninotto]

oops, sorry, I missed a side effect, back to WIP

[fzaninotto]

Well, that's in ReferenceArrayInputController, so not in this PR. Back to RFR.

[djhi]

Shouldn't we translate this error ?

[fzaninotto]

Ideally, yes. In a future PR? I'd like to have this pr merged quickly to release a new alpha soon.

[djhi]

Awesome!