refactor(plan_node): simplify batch-delete

[ice1000]

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What's changed and what's your intention?

Follow up of #8898, #8870, #8905, #8930, #8932, #9011, #9044, #9176, #9715, #9740.
This PR simplifies batch-update nodes.

Checklist For Contributors

• Yes

Documentation

• My PR DOES NOT contain user-facing changes.

[github-actions]

license-eye has totally checked 3421 files.

Valid	Invalid	Ignored	Fixed
1552	1	1868	0

Click to see the invalid file list

• src/frontend/src/optimizer/plan_node/generic/delete.rs

[codecov]

Codecov Report

Merging #9785 (09cfa99) into main (0995d35) will decrease coverage by 0.01%.
The diff coverage is 88.88%.

@@            Coverage Diff             @@
##             main    #9785      +/-   ##
==========================================
- Coverage   70.97%   70.96%   -0.01%     
==========================================
  Files        1245     1246       +1     
  Lines      208216   208208       -8     
==========================================
- Hits       147778   147757      -21     
- Misses      60438    60451      +13     

Flag	Coverage Δ
rust	70.96% <88.88%> (-0.01%)	⬇️

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Impacted Files	Coverage Δ
...rc/frontend/src/optimizer/plan_node/generic/mod.rs	0.00% <ø> (ø)
src/frontend/src/scheduler/plan_fragmenter.rs	67.57% <0.00%> (ø)
...c/frontend/src/optimizer/plan_node/batch_delete.rs	78.94% <66.66%> (+0.56%)	⬆️
...frontend/src/optimizer/plan_node/logical_delete.rs	69.09% <84.21%> (-13.21%)	⬇️
...frontend/src/optimizer/plan_node/generic/delete.rs	100.00% <100.00%> (ø)
src/frontend/src/planner/delete.rs	100.00% <100.00%> (ø)

... and 5 files with indirect coverage changes

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