chore(postgres): use require.NotNil instead of assert.NotNil (#3252)

* chore: use require.NotNil instead of assert.NotNil

* chore: remove use of assert

---------

Co-authored-by: Manuel de la Peña <[email protected]>

Author: nolandseigler

modules/postgres/postgres_test.go

@@ -17,7 +17,6 @@ import (
 	_ "github.com/jackc/pgx/v5/stdlib"
 	_ "github.com/lib/pq"
 	"github.com/mdelapenya/tlscert"
-	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 
 	"github.com/testcontainers/testcontainers-go"
@@ -237,12 +236,12 @@ func TestWithSSL(t *testing.T) {
 
 	db, err := sql.Open("postgres", connStr)
 	require.NoError(t, err)
-	assert.NotNil(t, db)
+	require.NotNil(t, db)
 	defer db.Close()
 
 	result, err := db.Exec("SELECT * FROM testdb;")
 	require.NoError(t, err)
-	assert.NotNil(t, result)
+	require.NotNil(t, result)
 }
 
 func TestSSLValidatesKeyMaterialPath(t *testing.T) {