Grid component support

[gbalint]

Problem:
Followup to #6636

The goal is to support interaction with grid item in the following scenario:

• the grid is in a component
• the grid renders the component's children
• the grid is not the root element of the component

Fix:
In #6636 I introduced a way to indentify a grid using the element path of its item (which is necessary because when the grid is in a non-focused component).

• GridMeasurementHelper collects the grids from the metadata. These grids in non-focused components are not in the metadata, so they are not collected. I fixed this by collecting component items from the grids too.
• To get the measurement data for these grids which identified by their items, I added a new parameter to getGridMeasurementHelperData so it can get the styling of the parentElement of the item's element.
• The measurement helper was identified by its element path, and the dom-sampler could retrieve the helper from the dom using that. However, this is again not a good solution for these grids in non-focused components, so I added global WeakMap which stores the pairing between HTMLElements of grids and the id attribute of their GridMeasurementHelper.
• I updated the path fiels names of GridContainerIdentifier and GridItemIdentifier: it was not a good idea to use the same name in the two paths, because it was possible to not check the type and use the path field.

Missing:
gridMoveStrategiesExtraCommands still tries to set grid props on the parent, and when it is a component, those can be absolutely useless. We should detect when that is the case, and not generate these commands.

Manual Tests:
I hereby swear that:

• I opened a hydrogen project and it loaded
• I could navigate to various routes in Play mode

[github-actions]

Try me

[relativeci]

#15164 Bundle Size — 58.08MiB (~+0.01%).

f687a58(current) vs d1d46c1 master#15154(baseline)

Warning

Bundle contains 70 duplicate packages – View duplicate packages

Bundle metrics   3 changes 1 regression

	Current #15164	Baseline #15154
Initial JS	41.06MiB(~+0.01%)	41.06MiB
Initial CSS	0B	0B
Cache Invalidation	18.14%	21.29%
Chunks	20	20
Assets	22	22
Modules	4169	4169
Duplicate Modules	213	213
Duplicate Code	27.29%(-0.04%)	27.3%
Packages	477	477
Duplicate Packages	70	70

Bundle size by type   2 changes 1 regression 1 improvement

	Current #15164	Baseline #15154
JS	58.08MiB (~+0.01%)	58.07MiB
HTML	7.37KiB (-0.25%)	7.39KiB

Bundle analysis report Branch chore/grid-component-support-2 Project dashboard

---

^{Generated by RelativeCI Documentation Report issue}

[seanparsons]

Passing around and holding onto DOM elements makes me a little twitchy. It can shift around underneath us as React updates it and we're holding onto a reference to something which could hold onto a lot of memory potentially.