[refactor](jdbc) Unify JDBC scanning into FileQueryScanNode/JniReader framework (#61141)

### What problem does this PR solve?

Refactor the JDBC data source scanning architecture to integrate with
the
unified FileScanner/JniReader framework, replacing the standalone
ExternalScanNode-based JDBC scan path.

#### Motivation

The JDBC scan path was independently implemented with its own operator
(JDBCScanLocalState), scanner (JdbcScanner), and JNI connector
(JniConnector
→ BaseJdbcExecutor hierarchy), while other JNI-based data sources
(Paimon,
Hudi, MaxCompute, TrinoConnector) already use the unified FileScanner →
JniReader → JniScanner path. This caused code duplication, maintenance
burden,
and architectural inconsistency.

#### Changes

1. BE: Split JniConnector into two focused classes:
- JniReader: JNI lifecycle management (open/read/close), base class for
all JNI readers (PaimonJniReader, HudiJniReader, JdbcJniReader, etc.)
   - JniDataBridge: Stateless data exchange between C++ Blocks and Java
     shared memory via JNI

2. Java: Introduce Strategy Pattern for database-specific type handling:
- JdbcTypeHandler interface with DefaultTypeHandler base implementation
   - Per-database handlers: MySQLTypeHandler, OracleTypeHandler,
     PostgreSQLTypeHandler, ClickHouseTypeHandler, SQLServerTypeHandler,
DB2TypeHandler, SapHanaTypeHandler, TrinoTypeHandler, GbaseTypeHandler
   - JdbcTypeHandlerFactory for handler selection
   - JdbcJniScanner (extends JniScanner) for read path
   - JdbcJniWriter (extends JniWriter) for write path
   - Old BaseJdbcExecutor subclasses marked @deprecated but preserved

3. FE: Migrate JdbcScanNode from ExternalScanNode to FileQueryScanNode:
   - JdbcScanNode now extends FileQueryScanNode
   - Introduces JdbcSplit (extends FileSplit) to carry JDBC params
   - Uses TFileScanRange with FORMAT_JNI and table_format_type="jdbc"
   - Adds jdbc_params field to TTableFormatFileDesc in Thrift
   - Adapts PhysicalPlanTranslator.visitPhysicalJdbcScan() accordingly

4. BE: Add JdbcJniReader and integrate into FileScanner:
- JdbcJniReader handles special types (bitmap, HLL, quantile_state,
JSONB)
     via string-based intermediary and CAST
   - FileScanner._get_next_reader() adds "jdbc" table_format_type branch
   - JdbcUtils utility for JDBC driver URL resolution
   - Existing JdbcScanner preserved as transitional (deprecated)

All predicate push-down logic (createJdbcFilters, getJdbcQueryStr, etc.)
is preserved from the original JdbcScanNode implementation.

Author: morningman

be/src/core/data_type_serde/data_type_quantilestate_serde.h

@@ -67,15 +67,17 @@ class DataTypeQuantileStateSerDe : public DataTypeSerDe {
     }
     Status deserialize_one_cell_from_json(IColumn& column, Slice& slice,
                                           const FormatOptions& options) const override {
-        return Status::NotSupported("deserialize_one_cell_from_text with type " +
-                                    column.get_name());
+        auto& data_column = assert_cast<ColumnQuantileState&>(column);
+        QuantileState quantile_state(slice);
+        data_column.insert_value(std::move(quantile_state));
+        return Status::OK();
     }
 
     Status deserialize_column_from_json_vector(IColumn& column, std::vector<Slice>& slices,
                                                uint64_t* num_deserialized,
                                                const FormatOptions& options) const override {
-        return Status::NotSupported("deserialize_column_from_text_vector with type " +
-                                    column.get_name());
+        DESERIALIZE_COLUMN_FROM_JSON_VECTOR();
+        return Status::OK();
     }
 
     Status write_column_to_pb(const IColumn& column, PValues& result, int64_t start,