refactor(proto): migrate FilterExec serde

[Phoenix500526]

Which issue does this PR close?

• Closes Proto: migrate FilterExec to the try_to_proto hook #23499.

Rationale for this change

The centralized protobuf dispatcher couples each execution plan to datafusion-proto. Adding plan serialization therefore requires changes outside the plan implementation.

Move FilterExec encoding and decoding behind its ExecutionPlan hooks. Preserve the existing wire format and retain the old helper methods as deprecated compatibility APIs.

What changes are included in this PR?

Are these changes tested?

Yes

Are there any user-facing changes?

[github-actions]

Thank you for opening this pull request!

Reviewer note: cargo-semver-checks reported the current version number is not SemVer-compatible with the changes in this pull request (compared against the base branch).

Details

     Cloning apache/main
    Building datafusion-physical-plan v54.0.0 (current)
       Built [  38.523s] (current)
     Parsing datafusion-physical-plan v54.0.0 (current)
      Parsed [   0.143s] (current)
    Building datafusion-physical-plan v54.0.0 (baseline)
       Built [  37.979s] (baseline)
     Parsing datafusion-physical-plan v54.0.0 (baseline)
      Parsed [   0.152s] (baseline)
    Checking datafusion-physical-plan v54.0.0 -> v54.0.0 (no change; assume patch)
     Checked [   0.662s] 223 checks: 223 pass, 30 skip
     Summary no semver update required
    Finished [  79.312s] datafusion-physical-plan
    Building datafusion-proto v54.0.0 (current)
       Built [  62.061s] (current)
     Parsing datafusion-proto v54.0.0 (current)
      Parsed [   0.019s] (current)
    Building datafusion-proto v54.0.0 (baseline)
       Built [  60.878s] (baseline)
     Parsing datafusion-proto v54.0.0 (baseline)
      Parsed [   0.019s] (baseline)
    Checking datafusion-proto v54.0.0 -> v54.0.0 (no change; assume patch)
     Checked [   0.263s] 223 checks: 222 pass, 1 fail, 0 warn, 30 skip

--- failure trait_method_marked_deprecated: trait method #[deprecated] added ---

Description:
A trait method is now #[deprecated]. Downstream crates will get a compiler warning when using this method.
        ref: https://doc.rust-lang.org/reference/attributes/diagnostics.html#the-deprecated-attribute
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.48.0/src/lints/trait_method_marked_deprecated.ron

Failed in:
  method try_into_filter_physical_plan in trait datafusion_proto::physical_plan::PhysicalPlanNodeExt in /home/runner/work/datafusion/datafusion/datafusion/proto/src/physical_plan/mod.rs:719
  method try_from_filter_exec in trait datafusion_proto::physical_plan::PhysicalPlanNodeExt in /home/runner/work/datafusion/datafusion/datafusion/proto/src/physical_plan/mod.rs:719

     Summary semver requires new minor version: 0 major and 1 minor checks failed
    Finished [ 124.414s] datafusion-proto

[codecov-commenter]

Codecov Report

❌ Patch coverage is 67.14286% with 23 lines in your changes missing coverage. Please review.
✅ Project coverage is 80.70%. Comparing base (774f0bc) to head (7172823).

Files with missing lines	Patch %	Lines
datafusion/proto/src/physical_plan/mod.rs	7.14%	13 Missing ⚠️
datafusion/physical-plan/src/filter.rs	82.14%	4 Missing and 6 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #23708      +/-   ##
==========================================
- Coverage   80.71%   80.70%   -0.01%     
==========================================
  Files        1089     1089              
  Lines      368280   368293      +13     
  Branches   368280   368293      +13     
==========================================
- Hits       297250   297237      -13     
- Misses      53314    53341      +27     
+ Partials    17716    17715       -1     

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[adriangb]

Can we have the deprecated method delegate to the new one to avoid code duplication and drift?

[Phoenix500526]

Done

[adriangb]

Thanks!