Separate testBasicTypes into different test methods for different column types

[tangjiangling]

#11148 (comment)

The testBasicTypes method of the existing connector type mapping tests can be optimized to:

• Makes the basic types(bigint/int/smallint ...) mapping test method simpler, with one method testing only one type
  • Separate testBasicTypes into different test methods for different column types
• Improve test coverage per basic types
  • Add min/max/min-1/max+1/null tests for each column type

Here is the list of connectors we need to modify:

• SqlServer - Separate SqlServer testBasicTypes into multiple tests #11214
  • BaseSqlServerTypeMapping#testBasicTypes
• ClickHouse - Improve ClickHouse type mapping tests #11340
  • TestClickHouseTypeMapping#testBasicTypes
• SingleStore(MemSql) - Improve SingleStore(MemSql) type mapping tests #11362
  • TestMemSqlTypeMapping#testBasicTypes
• MySql - Improve MySQL type mapping tests #11382
  • TestMySqlTypeMapping#testBasicTypes
• Phoenix4/5 - Improve Phoenix type mapping tests #11412
  • TestPhoenixTypeMapping#testBasicTypes
• PostgreSql - Improve PostgreSQL type mapping tests #11385
  • TestPostgreSqlTypeMapping#testBasicTypes