[Table] Add input for sticky columns

Introduce ability to have sticky columns in the cdk-table.

[oomz]

Yes please add a feature that enables a mat-table column to be sticky, my use case is this: I have a lot of columns in my table, and I enabled the horizontal scrolling of the table so the columns would not shrink to fit the windows size. My last column in the table is where my ‘actions’ column is located: add, edit delete. So for the user to see those buttons they have to scroll to the right. but it would be very nice if I can make that column always stick to the right so it is always visible by the user.

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