[MINOR]: Fix column indices in the planning tests

[mustafasrepo]

Which issue does this PR close?

Closes #.

Rationale for this change

I have recognized that in some of the tests under enforce_distribution.rs and replace_with_order_preserving_variant.rs. Column names and column indices are not consistent with the schema. Since during these test we do not execute these plans, inconsistencies didn't arise. However, if we were to run those plans, we would get error.

What changes are included in this PR?

This PR fixes, column name and indices in those tests so that they refer to valid fields in the schema.

Are these changes tested?

Existing tests should work.

Are there any user-facing changes?

[mustafasrepo]

Previously after projection there was no column c. However, sort above refers to c, this example changes projection below so that column c is still present at the input of the Sort (All of the changes in this PR are in similar spirit).

[alamb]

Thanks @mustafasrepo

I wonder if we could change the tests to actually try to run the plan (and verify there were no errors, rather than check the results 🤔 )

[mustafasrepo]

Thanks @mustafasrepo

I wonder if we could change the tests to actually try to run the plan (and verify there were no errors, rather than check the results 🤔 )

I think checking results is still necessary, to make sure we have expected plans. However, while doing so additionally we can run the plan to verify there is no error. We can add this support in following PR, where we execute optimized plan inside assert_optimized macro.