feat(expr): jsonb IS [NOT] NULL

[xiangjinwu]

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What's changed and what's your intention?

Add the missing support to use jsonb as input to IS [NOT] NULL. Also add tests for similar functions that are supposed to work for all types: CASE WHEN, COALESCE.

Note that bytea will be handled separately. Functions based on comparison (e.g. IS DISTINCT FROM, NULLIF, IN) are left out purposely.

Checklist For Contributors

• I have written necessary rustdoc comments
• I have added necessary unit tests and integration tests
• I have added an item to track fuzzing tests.
• All checks passed in ./risedev check (or alias, ./risedev c)

Documentation

Types of user-facing changes

• SQL commands, functions, and operators

Release note

Support jsonb IS [NOT] NULL.

[codecov]

Codecov Report

Merging #8256 (e3bff44) into main (c75863a) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #8256   +/-   ##
=======================================
  Coverage   71.60%   71.61%           
=======================================
  Files        1132     1132           
  Lines      183384   183385    +1     
=======================================
+ Hits       131308   131322   +14     
+ Misses      52076    52063   -13     

Flag	Coverage Δ
rust	71.61% <100.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/expr/src/sig/func.rs	94.28% <100.00%> (+0.02%)	⬆️
src/batch/src/task/task_execution.rs	51.75% <0.00%> (-0.51%)	⬇️
src/storage/src/hummock/compactor/mod.rs	80.38% <0.00%> (ø)
src/meta/src/hummock/manager/mod.rs	75.68% <0.00%> (+0.06%)	⬆️
src/common/src/types/ordered_float.rs	31.06% <0.00%> (+0.19%)	⬆️
src/meta/src/hummock/mock_hummock_meta_client.rs	65.46% <0.00%> (+1.03%)	⬆️
src/batch/src/executor/group_top_n.rs	74.70% <0.00%> (+6.47%)	⬆️

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