### What?
This PR aims to deflake the indexed fields e2e test in
`test/fields/collections/Indexed/e2e.spec.ts`.
The issue is that this test is setup in a way where sometimes two toasts
will present themselves in the ui. The second toast assertion will fail
with a strict mode violation as the toast locator will resolve to two
elements.
### Why?
To prevent this test from flaking in ci.
### How?
Adding a new `dismissAfterAssertion` flag to the `assertToastErrors`
helper function which dismisses the toasts. This way, the toasts will
not raise the aforementioned error as they will be dismissed from the
ui.
The logic is handled in a separate loop through such that the assertions
occur first. This is done so that dismissing a toast does not surface
errors due to the order of toasts being shown changing.
Fixes https://github.com/payloadcms/payload/issues/11568
### What? Out of sync errors states
- Collaspibles & Tabs were not reporting accurate child error counts
- Arrays could get into a state where they would not update their error
states
- Slight issue with toasts
### Tabs & Collapsibles
The logic for determining matching field paths was not functioning as
intended. Fields were attempting to match with paths such as `_index-0`
which will not work.
### Arrays
The form state was not updating when the server sent back errorPaths.
This PR adds `errorPaths` to `serverPropsToAccept`.
### Toasts
Some toasts could report errors in the form of `my > > error`. This
ensures they will be `my > error`
### Misc
Removes 2 files that were not in use:
- `getFieldStateFromPaths.ts`
- `getNestedFieldState.ts`
