Retain selectivity from supported AND conjuncts

[gabotechs]

Describe the bug

Adding an unsupported AND condition discards the useful estimate for the
supported condition. The extra restriction increases the estimate tenfold
because the whole predicate falls back to 20% selectivity.

To Reproduce

From the repository root, with the CLI fix from
PR #25570 applied:

cargo build --profile ci --locked -p datafusion-benchmarks --bin dfbench
cargo install tpchgen-cli --version 1.1.1 --locked # if not already installed
repro_dir=$(mktemp -d)
tpchgen-cli --scale-factor 1 --format parquet \
  --parquet-compression 'ZSTD(1)' --parts 1 --output-dir "$repro_dir/data"
cat > "$repro_dir/repro.sql" <<'SQL'
SET datafusion.execution.target_partitions = 1;
SET datafusion.optimizer.enable_dynamic_filter_pushdown = false;
SELECT p_partkey FROM part WHERE p_size = 15;

SELECT p_partkey FROM part WHERE p_size = 15 AND p_type LIKE '%BRASS%';
SQL
target/ci/dfbench statistics \
  --path "$repro_dir/data" --query_path "$repro_dir/repro.sql"

Observed with tpchgen-cli 1.1.1 at
6c320561b5.
Inspect the SELECT reports; ignore the empty SET reports.

SELECT	FilterExec node	Estimated rows	Actual rows
p_size = 15	0	4,000	3,907
Add AND p_type LIKE '%BRASS%'	0	40,000	747

Expected behavior

Retain supported conjunct estimates and combine unsupported conjuncts
conservatively. Adding an AND condition should not increase estimated rows; OR
requires different treatment.

Additional context

Related:
filter selectivity #14237.

Part of #25610.

[amitvijapur]

take