[BugFix] Fix csv converter and chunk column inconsistent in select into outfile

[wyb]

Why I'm doing:

in some cases, the nullable property between the column in the chunk and _output_expr_ctxs may not be consistent.
for example: order by limit + left outer join

select t1.k1, t1.k2, count(distinct t1.k3) as k33
from t1 left join t2 on t1.k1 = t2.k1
group by t1.k1,t1.k2 
order by k33

the result will be wrong if inconsistent.

What I'm doing:

use nullable converter, and process whether the column is nullable in the nullable converter.

Fixes #issue

What type of PR is this:

• BugFix
• Feature
• Enhancement
• Refactor
• UT
• Doc
• Tool

Does this PR entail a change in behavior?

• Yes, this PR will result in a change in behavior.
• No, this PR will not result in a change in behavior.

If yes, please specify the type of change:

• Interface/UI changes: syntax, type conversion, expression evaluation, display information
• Parameter changes: default values, similar parameters but with different default values
• Policy changes: use new policy to replace old one, functionality automatically enabled
• Feature removed
• Miscellaneous: upgrade & downgrade compatibility, etc.

Checklist:

• I have added test cases for my bug fix or my new feature
• This pr needs user documentation (for new or modified features or behaviors)
  • I have added documentation for my new feature or new function
• This is a backport pr

Bugfix cherry-pick branch check:

• I have checked the version labels which the pr will be auto-backported to the target branch
  • 3.3
  • 3.2
  • 3.1
  • 3.0
  • 2.5

[github-actions]

[FE Incremental Coverage Report]

✅ pass : 0 / 0 (0%)

[github-actions]

[BE Incremental Coverage Report]

✅ pass : 24 / 25 (96.00%)

file detail

	path	covered_line	new_line	coverage	not_covered_line_detail
🔵	be/src/exec/plain_text_builder.cpp	8	9	88.89%	[70]
🔵	be/src/formats/csv/nullable_converter.cpp	16	16	100.00%	[]

[github-actions]

@Mergifyio backport branch-3.3

[github-actions]

@Mergifyio backport branch-3.2

[github-actions]

@Mergifyio backport branch-3.1

[github-actions]

@Mergifyio backport branch-3.0

[mergify]

backport branch-3.1

✅ Backports have been created

• #48439 [BugFix] Fix csv converter and chunk column inconsistent in select into outfile (backport #48052) has been created for branch branch-3.1

[mergify]

backport branch-3.0

✅ Backports have been created

• #48440 [BugFix] Fix csv converter and chunk column inconsistent in select into outfile (backport #48052) has been created for branch branch-3.0

[mergify]

backport branch-2.5

✅ Backports have been created

• #48441 [BugFix] Fix csv converter and chunk column inconsistent in select into outfile (backport #48052) has been created for branch branch-2.5 but encountered conflicts