## Environment
**Liquibase Version**: org.liquibase:liquibase-core:jar:3.8.9

**Liquibase Integration & Version**: maven

**Database Vendor & Version**: postgres 11

**Operating System Type & Version**: ubuntu (wsl)

## Description
PrimaryKey constraint does not honor 'deferrable' and 'initiallyDeferred' settings so that created primary key is not 'deferred'

## Steps To Reproduce
Use script:

```
<databaseChangeLog xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
                   xmlns:ext="http://www.liquibase.org/xml/ns/dbchangelog-ext"
                   xmlns:pro="http://www.liquibase.org/xml/ns/pro"
                   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                   xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog-ext http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-ext.xsd http://www.liquibase.org/xml/ns/pro http://www.liquibase.org/xml/ns/pro/liquibase-pro-4.0.xsd http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-4.0.xsd">
    <changeSet author="author" id="some-id">  
        <createTable tableName="abc">
            <column name="id" type="INTEGER">
                <constraints nullable="false" primaryKey="true" primaryKeyName="abc_PK" deferrable="true" initiallyDeferred="true"/>
            </column>
        </createTable>
    </changeSet>
</databaseChangeLog>
```

## Actual Behavior
2020-12-18 09:01:19.936 [main] INFO  liquibase.executor.jvm.JdbcExecutor - CREATE TABLE public.abc (id INTEGER NOT NULL, CONSTRAINT "abc_PK" PRIMARY KEY (id))

## Expected/Desired Behavior
PRIMARY KEY is created with _deferrable initially deferred_


}
                    }
                } else {
                    Scope.getCurrentScope().getLog(getClass()).warning(database.getShortName()+" does not support autoincrement columns as requested for "+(database.escapeTableName(statement.getCatalogName(), statement.getSchemaName(), statement.getTableName())));
                }
            }
            
            if (statement.getNotNullColumns().get(column) != null) {
                if (!database.supportsNotNullConstraintNames()) {
                    buffer.append(" NOT NULL");
                } else {
                    
                    NotNullConstraint nnConstraintForThisColumn = statement.getNotNullColumns().get(column);
                    String nncName = StringUtil.trimToNull(nnConstraintForThisColumn.getConstraintName());
                    if (nncName == null) {
                        buffer.append(" NOT NULL");
                    } else {
                        buffer.append(" CONSTRAINT ");
                        buffer.append(database.escapeConstraintName(nncName));
                        buffer.append(" NOT NULL");
                    }
                    if (!nnConstraintForThisColumn.shouldValidateNullable()) {
                        if (database instanceof OracleDatabase) {
                            buffer.append(" ENABLE NOVALIDATE ");
                        }
                    }
                } 
            } else {
                if ((database instanceof SybaseDatabase) || (database instanceof SybaseASADatabase) || (database
                        instanceof MySQLDatabase) || ((database instanceof MSSQLDatabase) && columnType.toString()