refactor(plan_node): Share-related nodes refactoring.

[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.
This PR simplifies the initialization of share-related nodes.

Checklist For Contributors

• Yes

Documentation

• My PR DOES NOT contain user-facing changes.

[ice1000]

Lots of code are moved from logical_scan.rs into generic/scan.rs.

[codecov]

Codecov Report

Merging #9715 (e052c3f) into main (f512021) will decrease coverage by 0.01%.
The diff coverage is 94.17%.

@@            Coverage Diff             @@
##             main    #9715      +/-   ##
==========================================
- Coverage   70.99%   70.98%   -0.01%     
==========================================
  Files        1245     1245              
  Lines      208372   208369       -3     
==========================================
- Hits       147927   147913      -14     
- Misses      60445    60456      +11     

Flag	Coverage Δ
rust	70.98% <94.17%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
...nd/src/optimizer/plan_node/stream_temporal_join.rs	63.52% <33.33%> (ø)
...nd/src/optimizer/plan_visitor/sys_table_visitor.rs	58.82% <50.00%> (ø)
.../optimizer/plan_visitor/temporal_join_validator.rs	80.00% <50.00%> (ø)
...c/frontend/src/optimizer/plan_node/logical_scan.rs	90.62% <88.88%> (-5.48%)	⬇️
...frontend/src/optimizer/plan_node/batch_seq_scan.rs	95.60% <94.11%> (-0.17%)	⬇️
...ntend/src/optimizer/plan_node/stream_table_scan.rs	96.66% <94.11%> (-0.20%)	⬇️
...c/frontend/src/optimizer/plan_node/generic/scan.rs	96.61% <95.53%> (-3.39%)	⬇️
src/frontend/src/optimizer/mod.rs	92.37% <100.00%> (ø)
.../frontend/src/optimizer/plan_node/generic/share.rs	100.00% <100.00%> (ø)
...c/frontend/src/optimizer/plan_node/logical_join.rs	89.60% <100.00%> (ø)
... and 10 more

... and 3 files with indirect coverage changes

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