Intent of valid_integer

All 3 exact tests in this concept. Every test is marked by where it enters the hierarchy.

go.temporal.io/ 3 tests
- server/ 3 tests
  - common/ 3 tests
    
    persistence/ 3 tests
    
    visibility/ 3 tests
    
    store/ 3 tests
    
    sql/ 3 tests
    
    TestSQLiteQLQueryConverterSuite/ 3 tests
    
    TestConvertValueExpr/ 1 test
    
    go.temporal.io/server/common/persistence/visibility/store/sql/TestSQLiteQLQueryConverterSuite/TestConvertValueExpr/valid_integer Inherited valid_integer
    
    TestParseSQLVal/ 2 tests
    
    go.temporal.io/server/common/persistence/visibility/store/sql/TestSQLiteQLQueryConverterSuite/TestParseSQLVal/valid_ExecutionDuration_int_nanos Inherited valid_ExecutionDuration_int_nanos
    
    go.temporal.io/server/common/persistence/visibility/store/sql/TestSQLiteQLQueryConverterSuite/TestParseSQLVal/valid_integer Introduced here