[Masonry] ComputeAutomaticRepetitions

Compute the correct number of automatic repetitions for masonry in the
grid axis, which is essentially the same as that of grid's
implementation (CL:2606026), modulo lack for subgrid support.

This involved:

1. Tracking `masonry_available_size_`,`masonry_min_available_size_`, and
`masonry_max_available_size_` within the masonry layout algo.

2. Compute these values on masonry layout algorithm construction. This
involved moving common code with Grid to a new grid_layout_utils file.

3. Move common code for ComputeAutomaticRepetitions from Grid to the new
utils file.

4. Call into the new helper for calculating automatic repetitions in
masonry.

Note that there are a few test failures. These are unrelated to
automatic repetition calculations, but rather existing sizing bugs (I
believe there are overlaps with some of the other failing tests we've
seen in the external/wpt/css/css-grid/masonry/tentative folder).

Bug: 343257585
Change-Id: Id9262c4ff991d2f99aade50fa35bf3471c390760
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6654414
Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org>
Commit-Queue: Alison Maher <almaher@microsoft.com>
Cr-Commit-Position: refs/heads/main@{#1477580}