refactor(plan_node): use generics in update nodes

[ice1000]

I hereby agree to the terms of the RisingWave Labs, Inc. Contributor License Agreement.

What's changed and what's your intention?

Follow up of #8898, #8870, #8905, #8930, #8932, #9011, #9044, #9176, #9715.
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 3410 files.

Valid	Invalid	Ignored	Fixed
1552	1	1857	0

Click to see the invalid file list

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

[codecov]

Codecov Report

Merging #9740 (b342961) into main (e6dc622) will decrease coverage by 0.01%.
The diff coverage is 85.33%.

@@            Coverage Diff             @@
##             main    #9740      +/-   ##
==========================================
- Coverage   70.98%   70.97%   -0.01%     
==========================================
  Files        1245     1246       +1     
  Lines      208369   208350      -19     
==========================================
- Hits       147909   147875      -34     
- Misses      60460    60475      +15     

Flag	Coverage Δ
rust	70.97% <85.33%> (-0.01%)	⬇️

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

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_update.rs	68.00% <71.42%> (-4.42%)	⬇️
...frontend/src/optimizer/plan_node/logical_update.rs	58.20% <72.72%> (-22.50%)	⬇️
...frontend/src/optimizer/plan_node/generic/update.rs	100.00% <100.00%> (ø)
src/frontend/src/planner/update.rs	100.00% <100.00%> (ø)

... and 5 files with indirect coverage changes

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more