fix(material/table): data not being re-rendered when sortingDataAccessor is changed

[crisbeto]

Fixes the table's data not re-rendering when a new sortingDataAccessor is assigned to the data source.

Fixes #15888.

[nvaralakshmi]

@crisbeto It looks like this PR is outdated, please rebase the PR.

[crisbeto]

I spent some time trying to get this to pass all the internal checks, but it appears to be more breaking than I was expecting. The problem is that changing the sortDataAccessor to a getter/setter causes compilation errors for apps that do something like this:

class MyDataSource extends MatTableDataSource {
  override sortDataAccessor = customSortDataAccessor;
}

I tried working around it with the defineProperty call, but it ended up causing other issues. We should discuss whether it's worth the effort to continue with this change.