Make grid rearrange work in grid components

[gbalint]

Problem:
Grid rearrange does not work when the grid is a root element of a component.

Fix:
The problem is that we assume that the parent element of a grid item is the grid itself. However, when the grid is in a component, the parent element is the component instance, and not the grid element inside it. This is a problem because we can not find the grid measurement helper from the parent element path.

The solution is that all necessary grid related measurement data should be available in the metadata of the grid items themselves.

• Added new fields to specialSizeMeasurements about the parent grid
• Rewrote grid rearrange strategies and helpers to rely on the specialSizeMeasurements of the item, and not of the parent.

Still unsolved:

• Grid strategies set the props of the grid controls (e.g. to show which is the highlighted cell). These still assume that the control is on the parent, which is true in cases when the grid is root element of a component. Solving the problem for more problematic cases is out of scope for this PR.

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]

#14932 Bundle Size — 57.98MiB (~+0.01%).

3bb7351(current) vs 916e8b9 master#14928(baseline)

Warning

Bundle contains 70 duplicate packages – View duplicate packages

Bundle metrics   2 changes 1 regression

	Current #14932	Baseline #14928
Initial JS	40.97MiB(~+0.01%)	40.96MiB
Initial CSS	0B	0B
Cache Invalidation	18%	0%
Chunks	20	20
Assets	22	22
Modules	4152	4152
Duplicate Modules	213	213
Duplicate Code	27.33%	27.33%
Packages	477	477
Duplicate Packages	70	70

Bundle size by type   2 changes 1 regression 1 improvement

	Current #14932	Baseline #14928
JS	57.98MiB (~+0.01%)	57.97MiB
HTML	7.37KiB (-0.25%)	7.39KiB

Bundle analysis report Branch fix/grid-components Project dashboard

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