Add ScalarUDF preserves_lex_ordering FFI support

[Amogh-2404]

Which issue does this PR close?

• Closes FFI: FFI_ScalarUDF silently drops producer overrides of defaulted trait methods #22330.

Rationale for this change

FFI_ScalarUDF did not expose ScalarUDFImpl::preserves_lex_ordering, so a producer override was lost when the UDF crossed the FFI boundary.

What changes are included in this PR?

• Adds preserves_lex_ordering to FFI_ScalarUDF.
• Converts ExprProperties through the existing FFI representation.
• Adds unit and cross-library integration coverage for the foreign UDF path.

Are these changes tested?

• cargo fmt --all
• cargo test -p datafusion-ffi
• cargo test -p datafusion-ffi --features integration-tests
• cargo clippy -p datafusion-ffi --all-targets --all-features -- -D warnings
• Pre-push gate, including workspace clippy and sqllogictests

Are there any user-facing changes?

No end-user behavior change. This updates the DataFusion FFI ABI.

[Amogh-2404]

This changes the FFI_ScalarUDF layout, so it needs the api change label.

[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-ffi v54.0.0 (current)
       Built [  38.162s] (current)
     Parsing datafusion-ffi v54.0.0 (current)
      Parsed [   0.043s] (current)
    Building datafusion-ffi v54.0.0 (baseline)
       Built [  38.704s] (baseline)
     Parsing datafusion-ffi v54.0.0 (baseline)
      Parsed [   0.070s] (baseline)
    Checking datafusion-ffi v54.0.0 -> v54.0.0 (no change; assume patch)
     Checked [   0.180s] 223 checks: 221 pass, 1 fail, 1 warn, 30 skip

--- failure constructible_struct_adds_field: externally-constructible struct adds field ---

Description:
A pub struct constructible with a struct literal has a new pub field. Existing struct literals must be updated to include the new field.
        ref: https://doc.rust-lang.org/reference/expressions/struct-expr.html
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.48.0/src/lints/constructible_struct_adds_field.ron

Failed in:
  field ForeignLibraryModule.create_lex_ordering_udf in /home/runner/work/datafusion/datafusion/datafusion/ffi/src/tests/mod.rs:95
  field FFI_ScalarUDF.preserves_lex_ordering in /home/runner/work/datafusion/datafusion/datafusion/ffi/src/udf/mod.rs:106

--- warning repr_c_plain_struct_fields_reordered: struct fields reordered in repr(C) struct ---

Description:
A public repr(C) struct had its fields reordered. This can change the struct's memory layout, possibly breaking FFI use cases that depend on field position and order.
        ref: https://doc.rust-lang.org/reference/type-layout.html#reprc-structs
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.48.0/src/lints/repr_c_plain_struct_fields_reordered.ron

Failed in:
  ForeignLibraryModule.create_table_function moved from position 9 to 10, in /home/runner/work/datafusion/datafusion/datafusion/ffi/src/tests/mod.rs:97
  ForeignLibraryModule.create_sum_udaf moved from position 10 to 11, in /home/runner/work/datafusion/datafusion/datafusion/ffi/src/tests/mod.rs:101
  ForeignLibraryModule.create_stddev_udaf moved from position 11 to 12, in /home/runner/work/datafusion/datafusion/datafusion/ffi/src/tests/mod.rs:104
  ForeignLibraryModule.create_rank_udwf moved from position 12 to 13, in /home/runner/work/datafusion/datafusion/datafusion/ffi/src/tests/mod.rs:106
  ForeignLibraryModule.create_extension_options moved from position 13 to 14, in /home/runner/work/datafusion/datafusion/datafusion/ffi/src/tests/mod.rs:109
  ForeignLibraryModule.create_empty_exec moved from position 14 to 15, in /home/runner/work/datafusion/datafusion/datafusion/ffi/src/tests/mod.rs:111
  ForeignLibraryModule.create_exec_with_statistics moved from position 15 to 16, in /home/runner/work/datafusion/datafusion/datafusion/ffi/src/tests/mod.rs:113
  ForeignLibraryModule.create_table_with_statistics moved from position 16 to 17, in /home/runner/work/datafusion/datafusion/datafusion/ffi/src/tests/mod.rs:115
  ForeignLibraryModule.create_physical_optimizer_rule moved from position 17 to 18, in /home/runner/work/datafusion/datafusion/datafusion/ffi/src/tests/mod.rs:118
  ForeignLibraryModule.create_context_aware_optimizer_rule moved from position 18 to 19, in /home/runner/work/datafusion/datafusion/datafusion/ffi/src/tests/mod.rs:120
  ForeignLibraryModule.version moved from position 19 to 20, in /home/runner/work/datafusion/datafusion/datafusion/ffi/src/tests/mod.rs:122
  FFI_ScalarUDF.clone moved from position 9 to 10, in /home/runner/work/datafusion/datafusion/datafusion/ffi/src/udf/mod.rs:113
  FFI_ScalarUDF.release moved from position 10 to 11, in /home/runner/work/datafusion/datafusion/datafusion/ffi/src/udf/mod.rs:116
  FFI_ScalarUDF.private_data moved from position 11 to 12, in /home/runner/work/datafusion/datafusion/datafusion/ffi/src/udf/mod.rs:120
  FFI_ScalarUDF.library_marker_id moved from position 12 to 13, in /home/runner/work/datafusion/datafusion/datafusion/ffi/src/udf/mod.rs:125

     Summary semver requires new major version: 1 major and 0 minor checks failed
     Warning produced 1 major and 0 minor level warnings
    Finished [  79.456s] datafusion-ffi