Fix some more SQL set op + PartiQL bag op tests

[alancai98]

Issue #, if available:

• Related to RFC-0007 Bag Operator Coercion Behavior Inconsistencies partiql-lang#76 and Fixes an outer union coercion test #120
• Same tests changed as Fixes several tests #122

Description of changes:

• Fixes some more PartiQL bag op tests related to Fixes an outer union coercion test #120. Specifically for strict mode, error when an outer bag op argument is a non-collection
• Also adds some PartiQL bag op parsing tests using ORDER BY, LIMIT, and OFFSET

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[alancai98]

Tests from L146-346 do the following

• For strict mode, give an error when coercing a non-collection
• Adds INTERSECT and EXCEPT versions of the existing OUTER UNION tests

[alancai98]

Some additional PartiQL bag op tests to not allow for parsing of OUTER <set op> with ORDER BY, LIMIT, or OFFSET.

[alancai98]

From offline discussion, decided we shall allow for LIMIT, OFFSET, and ORDER BY to be applied to outer bag ops. And also modify the coercion logic for NULL and MISSING (i.e. wrap the absent value in a bag rather than empty bag). I will update the PR to reflect those changes.