GH-1134: add COLUMN_DEF to all table_schema for Commands

Author: Verest

arrow-format/FlightSql.proto

@@ -1681,6 +1681,7 @@ message ActionEndSavepointRequest {
  *    - ARROW:FLIGHT:SQL:IS_READ_ONLY      - "1" indicates if the column is read only, "0" otherwise.
  *    - ARROW:FLIGHT:SQL:IS_SEARCHABLE     - "1" indicates if the column is searchable via WHERE clause, "0" otherwise.
  *    - ARROW:FLIGHT:SQL:REMARKS           - A comment describing the column.
+ *    - ARROW:FLIGHT:SQL:COLUMN_DEF        - The default value for the column.
  *  - GetFlightInfo: execute the query.
  */
 message CommandStatementQuery {
@@ -1707,6 +1708,7 @@ message CommandStatementQuery {
  *    - ARROW:FLIGHT:SQL:IS_READ_ONLY      - "1" indicates if the column is read only, "0" otherwise.
  *    - ARROW:FLIGHT:SQL:IS_SEARCHABLE     - "1" indicates if the column is searchable via WHERE clause, "0" otherwise.
  *    - ARROW:FLIGHT:SQL:REMARKS           - A comment describing the column.
+ *    - ARROW:FLIGHT:SQL:COLUMN_DEF        - The default value for the column.
  *  - GetFlightInfo: execute the query.
  *  - DoPut: execute the query.
  */
@@ -1744,6 +1746,7 @@ message TicketStatementQuery {
  *    - ARROW:FLIGHT:SQL:IS_READ_ONLY      - "1" indicates if the column is read only, "0" otherwise.
  *    - ARROW:FLIGHT:SQL:IS_SEARCHABLE     - "1" indicates if the column is searchable via WHERE clause, "0" otherwise.
  *    - ARROW:FLIGHT:SQL:REMARKS           - A comment describing the column.
+ *    - ARROW:FLIGHT:SQL:COLUMN_DEF        - The default value for the column.
  *
  *    If the schema is retrieved after parameter values have been bound with DoPut, then the server should account
  *    for the parameters when determining the schema.