[Local testing] Fixes various local testing bugs

[tvdboom]

1. Which Jira issue is this PR addressing? Make sure that there is an accompanying issue to your PR.

   Fixes SNOW-1668981
   Fixes SNOW-1360263
   Fixes SNOW-1668862
   Fixes SNOW-1694649
   Fixes SNOW-1707286

2. Fill out the following pre-review checklist:

   • I am adding a new automated test(s) to verify correctness of my new code
     • If this test skips Local Testing mode, I'm requesting review from @snowflakedb/local-testing
   • I am adding new logging messages
   • I am adding a new telemetry message
   • I am adding new credentials
   • I am adding a new dependency
   • If this is a new feature/behavior, I'm adding the Local Testing parity changes.

3. Please describe how your code solves the related issue.

SNOW-1668981

The code block

for k, v in expr_to_alias.items():
  if v == exp.child.name:
      expr_to_alias[k] = quoted_name

wrongly overwrites the expr_to_alias of the columns in dataframe anti (see minimal reproducible example in #2305). I am unsure when this code block would be desirable. Tests pass without them. Still, better for a maintainer to have a good look at this change. If it's required, we could make it optional under a condition yet to be determined.

SNOW-1360263

The windows variable needs to be ordered by the order of the index in res_index.

SNOW-1668862

Literal columns were always created with nullable=False, which made lit(None) columns fail. Now, lit(None) returns a nullable column.

SNOW-1694649

In the merge statement, filtering on the join_condition resulted in a dataframe with unordered indices. This resulted in a failure when calling new_column[either_isna]. Reseting the index solves the issue.

SNOW-1707286

Can't operate on None and datetime. Return None directly.

[github-actions]

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[tvdboom]

I have read the CLA Document and I hereby sign the CLA

[MarcovdBoom]

I have read the CLA Document and I hereby sign the CLA

[MarcovdBoom]

recheck

[tvdboom]

Actually, I found another use case where the removed code block

for k, v in expr_to_alias.items():
  if v == exp.child.name:
      expr_to_alias[k] = quoted_name

is required. @sfc-gh-jrose I see you got assigned #2305, could you help out?

[tvdboom]

@sfc-gh-jrose any change you can help out or review the pr?

[sfc-gh-jrose]

I will review and help merge this week.

[sfc-gh-jrose]

I've moved your fork into a branch in order to get our checks to run correctly. I've also added tests to ensure the examples provided pass. See #2410

[tvdboom]

Perfect, thanks. I guess this pr can be closed then.