* Expose `setIsFullScreen` to ref API

* Update documentation/examples

#5550)

* [setup] Update testCustomHook to expose fn that allows accessing most recent state/value

- without this callback, the initial returned hook values will be stale/not properly return most recent values
- see next commit for example usage within useCellPopover

* Set up cell popover context

- set up initial open/location state, + open/close popover APIs returned to consumers

- improve auto props documentation - remove EuiDataGridCellLocation in favor of specifying rowIndex and colIndex (it's less DRY but it's easier for devs to not have to look up EuiDataGridCellLocation from our docs)

* Pass down popoverContext to cells as a prop

- I'm not using context here because we're already using this.context for focus, and unfortunately class components can only initialize one context at time using `static contextType` (see https://reactjs.org/docs/context.html#classcontexttype)

* Remove internal cell popoverIsOpen state

- This should now be handled by the overarching context state, and the cell should simply react to it or update it (similar to how focusContext works)

+ add new var for hasCellButtons

+ add unit tests for isFocusedCell alongside isPopoverOpen (since both methods perform similar functions)

* Update cell popovers to set the popover anchor & content

- content is TODO, will likely be easier to compare when cleaning it up/moving it all at once

* Refactor EuiDataGridCellPopover

- It should no longer exist as a reusable component that belongs to every single cell, but instead as a single popover that exists at the top grid level and moves from cell to cell

- I cleaned and split up the JSX for the popover (e.g. moving popover actions to data_grid_cell_buttons, where it feels like it belongs more) and think it's significantly more DRY now - note the entire `anchorContent` branch removed from EuiDataGridCell that is no longer necessary

- Note that due to this change, we now have to mock EuiWrappingPopover in EuiDataGrid tests, as we see failures otherwise

* [bugfix] Handle cells with open popover being scrolled out of view

- this is the same behavior as in prod

- causes weird DOM issues if we don't close the cell popover automatically

* [bugfix] Workaround for popover DOM stuttering issues

* [enhancement] Account for openCellPopover being called on cells out of view

+ write bonus Cypress test for useScroll's focus effect now that we have access to the imperative ref

* Update documentation example

+ remove code snippet - it was starting to get redundant with the API bullet points, and is already available as tab if needed

+ fix control button widths

* [PR feedback] Be more specific about useImperativeHandle dependencies

+ add a few explanatory comments

* [PR feedback] Rename openCellLocation to cellLocation

- to make it sound less like a verb/method

* [PR feedback] Ignore edge case of `openCellPopover` being called on an `isExpandable: false` cell

…, off-page, or out of view cells (#5572)

* Enable sorting + targeting row indices outside of the current page

- to test handling the exposed APIs when dealing with sorted/paginated data

* Switch data grid example to Typescript

- to test type issues during consumer usage

+ @ts-ignore faker complaints

* Fix cell expansion buttons on paginated pages not working correctly

* Attempt to more clearly document `rowIndex`s that are actually `visibleRowIndex`s

* [setup] Move imperative handler setup to its own util file

- this will let us set up ref-specific helpers & add more comment context without bloating the main file

* Add catch/check for cell locations that do not exist in the current grid

* Add getVisibleRowIndex helper

- Converts the `rowIndex` from the consumer to a `visibleRowIndex` that our internal state can use

- Account for sorted grid by finding the inversed index of the `sortedRowMap`
- To make this easier, I converted soredRowMap to an array (since it's already only uses numbers for both keys and values), since arrays have a handy .findIndex method

- Handles automatically paginating the grid if the targeted cell is on a different page

* Replace grid ref Jest tests with more complete Cypress tests

* Update documentation with new behavior

* [PR feedback] Rename fns to indicate multiple concerns

- having a side effect in a getter feels bad, so change that to a `find`
- rename use hook to indicate sorting and pagination concerns

- primarily for use within trailing/leading cells and custom actions

- see 1609e45