feat(expr): add support for abs function

[xiaoyong-z]

Apart from add support for abs function, this pr also adds gen_unary_atm_expr macro and reconstruct previous neg function with gen_unary_atm_expr

Signed-off-by: xyz [email protected]

What's changed and what's your intention?

1. add support for abs function
2. add gen_unary_atm_expr macro, lator we can use this marco to support other unary function
3. reconstruct previous neg function with new gen_unary_atm_expr

Checklist

• I have written necessary docs and comments
• I have added necessary unit tests and integration tests

Refer to a related PR or issue link (optional)

#112

[fuyufjh]

LGTM!

[codecov]

Codecov Report

Merging #2531 (73b9ece) into main (6b7d5b7) will decrease coverage by 0.01%.
The diff coverage is 44.11%.

@@            Coverage Diff             @@
##             main    #2531      +/-   ##
==========================================
- Coverage   72.17%   72.15%   -0.02%     
==========================================
  Files         674      674              
  Lines       87831    87860      +29     
==========================================
+ Hits        63395    63399       +4     
- Misses      24436    24461      +25     

Flag	Coverage Δ
rust	72.15% <44.11%> (-0.02%)	⬇️

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

Impacted Files	Coverage Δ
src/common/src/types/decimal.rs	79.84% <0.00%> (-2.15%)	⬇️
src/expr/src/vector_op/arithmetic_op.rs	76.26% <0.00%> (-3.22%)	⬇️
src/expr/src/expr/expr_unary.rs	75.72% <50.00%> (-0.25%)	⬇️
src/expr/src/expr/mod.rs	47.61% <100.00%> (ø)
src/frontend/src/binder/expr/function.rs	91.45% <100.00%> (+0.07%)	⬆️
src/frontend/src/expr/type_inference.rs	97.91% <100.00%> (+0.03%)	⬆️
src/meta/src/model/barrier.rs	78.57% <0.00%> (-3.58%)	⬇️
src/connector/src/filesystem/file_common.rs	79.46% <0.00%> (-1.34%)	⬇️
src/storage/src/object/disk.rs	94.50% <0.00%> (-0.27%)	⬇️
src/common/src/types/ordered_float.rs	24.70% <0.00%> (-0.20%)	⬇️

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[fuyufjh]

Please fix the conflicts