## 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_


COLUMN_NAME1,
                    DataTypeFactory.getInstance().fromDescription("BIGINT{autoIncrement:true}", database),
                    new AutoIncrementConstraint(COLUMN_NAME1, BigInteger.ZERO, BigInteger.TEN)
                );
                Sql[] generatedSql = this.generatorUnderTest.generateSql(statement, database, null);
                assertEquals("CREATE TABLE CATALOG_NAME.TABLE_NAME (COLUMN1_NAME BIGINT GENERATED BY DEFAULT AS IDENTITY (START WITH 0, INCREMENT BY 10))", generatedSql[0].toSql());
            }
        }
    }
    @Test
    public void testAutoIncrementH2Database() throws Exception {
        for (Database database : TestContext.getInstance().getAllDatabases()) {
            if (database instanceof H2Database) {
                CreateTableStatement statement = new CreateTableStatement(CATALOG_NAME, SCHEMA_NAME, TABLE_NAME);
                statement.addColumn(
                    COLUMN_NAME1,
                    DataTypeFactory.getInstance().fromDescription("BIGINT{autoIncrement:true}", database),
                    new AutoIncrementConstraint(COLUMN_NAME1)
                );
                Sql[] generatedSql = this.generatorUnderTest.generateSql(statement, database, null);
                assertEquals("CREATE TABLE SCHEMA_NAME.TABLE_NAME (COLUMN1_NAME BIGINT AUTO_INCREMENT)", generatedSql[0].toSql());
            }
        }
    }
    @Test
    public void testAutoIncrementStartWithH2Database() throws Exception {
        for (Database database : TestContext.getInstance().getAllDatabases()) {
            if (database instanceof H2Database) {
                CreateTableStatement statement = new CreateTableStatement(CATALOG_NAME, SCHEMA_NAME, TABLE_NAME);
                statement.addColumn(