refactor(table): rename MatTableDataSource to ClientArrayTableDataSource

[crisbeto]

Renames the MatTableDataSource to ClientArrayTableDataSource to make it a bit clearer what it's supposed to be used for.

Fixes #14378.

[jelbourn]

Added to 11.0.0 milestone

[andrewseguin]

Needs rebase

[crisbeto]

I'm closing this since it's pretty breaking and way out of date. We can recreate it if we still think it's a good idea.

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