feat(table): support mod and hive bucket functions

[Aitozi]

Purpose

Support the remaining fixed-bucket function types in Rust table writes and scan pruning:

• bucket-function.type=mod for single-column INT/BIGINT bucket keys using floor-mod semantics.
• bucket-function.type=hive using Hive-compatible hash semantics for fixed bucket keys.
• Reuse one bucket calculation path for write routing and bucket predicate pruning so both sides stay aligned.

Tests

• cargo fmt --all -- --check
• git diff --check
• cargo test -p paimon bucket_function --lib
• cargo test -p paimon test_compute_target_buckets_ --lib
• cargo test -p paimon --lib
• cargo test -p paimon-integration-tests test_fixed_bucket_scan_filters_by_bucket --test append_tables
• cargo check -p paimon -p paimon-integration-tests -p paimon-datafusion

Note: cargo check --workspace is blocked locally by the Python binding environment because the active interpreter is Python 3.9 while pyo3 is configured with abi3-py310.

[JingsongLi]

+1