Intent of in_expression, in_expression, +4

All 10 exact tests in this concept. Every test is marked by where it enters the hierarchy.

go.temporal.io/ 10 tests
- server/ 10 tests
  - common/ 10 tests
    
    persistence/ 10 tests
    
    visibility/ 10 tests
    
    store/ 10 tests
    
    sql/ 10 tests
    
    TestMySQLQueryConverterSuite/ 4 tests
    
    TestConvertComparisonExpr/ 2 tests
    
    go.temporal.io/server/common/persistence/visibility/store/sql/TestMySQLQueryConverterSuite/TestConvertComparisonExpr/in_expression Introduced here
    
    go.temporal.io/server/common/persistence/visibility/store/sql/TestMySQLQueryConverterSuite/TestConvertComparisonExpr/not_in_expression Introduced here
    
    TestConvertKeywordListComparisonExpr/ 2 tests
    
    go.temporal.io/server/common/persistence/visibility/store/sql/TestMySQLQueryConverterSuite/TestConvertKeywordListComparisonExpr/valid_in_expression Inherited query_converter_legacy_mysql.go ×7
    
    go.temporal.io/server/common/persistence/visibility/store/sql/TestMySQLQueryConverterSuite/TestConvertKeywordListComparisonExpr/valid_not_in_expression Inherited valid_not_in_expression
    
    TestPostgreSQLQueryConverterSuite/ 4 tests
    
    TestConvertComparisonExpr/ 2 tests
    
    go.temporal.io/server/common/persistence/visibility/store/sql/TestPostgreSQLQueryConverterSuite/TestConvertComparisonExpr/in_expression Introduced here
    
    go.temporal.io/server/common/persistence/visibility/store/sql/TestPostgreSQLQueryConverterSuite/TestConvertComparisonExpr/not_in_expression Introduced here
    
    TestConvertKeywordListComparisonExpr/ 2 tests
    
    go.temporal.io/server/common/persistence/visibility/store/sql/TestPostgreSQLQueryConverterSuite/TestConvertKeywordListComparisonExpr/valid_in_expression Inherited query_converter_legacy_postgresql.go ×7
    
    go.temporal.io/server/common/persistence/visibility/store/sql/TestPostgreSQLQueryConverterSuite/TestConvertKeywordListComparisonExpr/valid_not_in_expression Inherited query_converter_legacy_postgresql.go ×1
    
    TestSQLiteQLQueryConverterSuite/ 2 tests
    
    TestConvertComparisonExpr/ 2 tests
    
    go.temporal.io/server/common/persistence/visibility/store/sql/TestSQLiteQLQueryConverterSuite/TestConvertComparisonExpr/in_expression Introduced here
    
    go.temporal.io/server/common/persistence/visibility/store/sql/TestSQLiteQLQueryConverterSuite/TestConvertComparisonExpr/not_in_expression Introduced here