## 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_


addColumn(columnName, columnType, defaultValue, allConstraints.toArray(new ColumnConstraint[allConstraints.size()]));
        return this;
    }
    public CreateTableStatement addPrimaryKeyColumn(String columnName, LiquibaseDataType columnType, Object defaultValue,
        Boolean validate,String keyName, String tablespace, ColumnConstraint... constraints) {
        PrimaryKeyConstraint pkConstraint = new PrimaryKeyConstraint(keyName);
        if (validate!=null) {
            pkConstraint.setValidatePrimaryKey(validate);
        }
        pkConstraint.addColumns(columnName);
        pkConstraint.setTablespace(tablespace);
        List<ColumnConstraint> allConstraints = new ArrayList<ColumnConstraint>(Arrays.asList(constraints));
        allConstraints.add(new NotNullConstraint(columnName));
        allConstraints.add(pkConstraint);
        addColumn(columnName, columnType, defaultValue, allConstraints.toArray(new ColumnConstraint[allConstraints.size()]));
        return this;
    }
    public CreateTableStatement addColumn(String columnName, LiquibaseDataType columnType) {
        return addColumn(columnName, columnType, null, new ColumnConstraint[0]);
    }
    public CreateTableStatement addColumn(String columnName, LiquibaseDataType columnType, Object defaultValue) {
        if (defaultValue instanceof ColumnConstraint) {
            return addColumn(columnName,  columnType, null, new ColumnConstraint[]{(ColumnConstraint) defaultValue});
        }
        return addColumn(columnName, columnType, defaultValue, new ColumnConstraint[0]);
    }
    public CreateTableStatement addColumn(String columnName, LiquibaseDataType columnType, ColumnConstraint[] constraints) {
        return addColumn(columnName, columnType, null, constraints);
    }
    public CreateTableStatement addColumn(String columnName, LiquibaseDataType columnType, Object defaultValue, ColumnConstraint[] constraints) {