Fix table alias parsing regression in 0.31.0 by backing out redshift column definition list

[alamb]

Closes #826

This fixes a table alias parsing regression by reverting the change from #769 by @mskrzypkows and adding a regression test to protect against regressions in the future.

I will leave some additional notes on #769 about the cause

[coveralls]

Pull Request Test Coverage Report for Build 4344670584

• 18 of 18 (100.0%) changed or added relevant lines in 1 file are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.07%) to 86.097%

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Files with Coverage Reduction	New Missed Lines	%
src/ast/query.rs	1	85.71%

Totals
Change from base Build 4315671296:	-0.07%
Covered Lines:	13451
Relevant Lines:	15623

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💛 - Coveralls

[alamb]

cc @ankrgyl and @mskrzypkows I wonder if you have some time to review this PR

[mskrzypkows]

I think I have a better solution to this problem, so it's even better that it's reverted :-)

[ankrgyl]

the regression test lgtm

[alamb]

Thanks for the quick turnaround @ankrgyl and @mskrzypkows