Use a looser tolerance on pitch for HexGrid roughly equal check

[drewj-tp]

What is the change?

Use math.isclose to compare pitches of two hex grids rather than strict equality.

Why is the change being made?

We don't need a super strict check to make sure the grids are roughly equal. The ideal of the method is to check that one index location in one grid would be in approximately the same spatial location in the other grid. Otherwise we can't accurately rotate the position within the grid.

This problem came up in some shuffling work where two assemblies had ever so slightly different pitches, on the order of hundreths of a percent. The strict other.pitch == self.pitch failed even though, for the purposes of this method, the two grids are "roughly equal"

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Checklist

• This PR has only one purpose or idea.
• Tests have been added/updated to verify any new/changed code.

• The code style follows good practices.
• The commit message(s) follow good practices.

• The release notes have been updated if necessary.
• The documentation is still up-to-date in the doc folder.
• The dependencies are still up-to-date in pyproject.toml.

[mgjarrett]

The default tolerance for math.isclose is 1e-9; I think we want this to be a little looser (like 1e-3 or 1e-4) to allow for two assemblies that have slightly different pin pitches but otherwise have the same number of pins.

[drewj-tp]

The default tolerance for math.isclose is 1e-9; I think we want this to be a little looser (like 1e-3 or 1e-4) to allow for two assemblies that have slightly different pin pitches but otherwise have the same number of pins.

Not sure how that disappeared but I did write out a rel_tol=1e-4 locally...

Let me re-add that and add a test accordingly

[mgjarrett]

Looks good, just need to add release notes