Add Spark cast mode special form registration

[ReemaAlzaid]

Summary

• Add registration support for Spark ANSI and legacy cast mode special forms.
• Introduce cast mode specific special form adapters that construct SparkCastExpr with the correct try-cast and overflow behavior.
• Expose isAnsiSupported so ANSI cast handling can fall back for unsupported cast pairs.

related PR: apache/gluten#12051

[netlify]

✅ Deploy Preview for meta-velox canceled.

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[github-actions]

Build Impact Analysis

Selective Build Targets (building these covers all 21 affected)

cmake --build _build/release --target spark_expression_fuzzer_test velox_date_extract_benchmark velox_expression_runner_test velox_expression_runner_unit_test velox_functions_spark_aggregates_test velox_functions_spark_test velox_spark_function_registry_test velox_spark_query_runner_test velox_sparksql_benchmarks_cast velox_sparksql_benchmarks_compare velox_sparksql_benchmarks_from_json velox_sparksql_benchmarks_get_funcs velox_sparksql_benchmarks_hash velox_sparksql_benchmarks_in velox_sparksql_benchmarks_simd_compare velox_sparksql_benchmarks_split velox_sparksql_coverage

Total affected: 21/580 targets

Affected targets (21)

Directly changed (2)

Target	Changed Files
velox_functions_spark	SparkCastExpr.h
velox_functions_spark_specialforms	SparkCastExpr.cpp, SparkCastExpr.h

Transitively affected (19)

• spark_expression_fuzzer_test
• velox_date_extract_benchmark
• velox_expression_runner
• velox_expression_runner_test
• velox_expression_runner_unit_test
• velox_functions_spark_aggregates_test
• velox_functions_spark_impl
• velox_functions_spark_test
• velox_spark_function_registry_test
• velox_spark_query_runner_test
• velox_sparksql_benchmarks_cast
• velox_sparksql_benchmarks_compare
• velox_sparksql_benchmarks_from_json
• velox_sparksql_benchmarks_get_funcs
• velox_sparksql_benchmarks_hash
• velox_sparksql_benchmarks_in
• velox_sparksql_benchmarks_simd_compare
• velox_sparksql_benchmarks_split
• velox_sparksql_coverage

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Fast path • Graph from main@70256ffc69a3077c68079822d3d2b37f0c88cf8c

[rui-mo]

Please add tests and update relevant documentations. Thanks.

Also FYI: https://github.com/facebookincubator/velox/blob/main/scripts/review/SELF_REVIEW.md

[rui-mo]

Currently no call site wires it into registration.