feat: delete user scim v2 endpoint (#9151)

# Which Problems Are Solved
- Adds support for the user delete SCIM v2 endpoint

# How the Problems Are Solved
- Adds support for the user delete SCIM v2 endpoint under `DELETE
/scim/v2/{orgID}/Users/{id}`

# Additional Context
Part of #8140

internal/integration/scim/assertions.go

@@ -0,0 +1,22 @@
+package scim
+
+import (
+	"errors"
+	"strconv"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+type AssertedScimError struct {
+	Error *ScimError
+}
+
+func RequireScimError(t require.TestingT, httpStatus int, err error) AssertedScimError {
+	require.Error(t, err)
+
+	var scimErr *ScimError
+	assert.True(t, errors.As(err, &scimErr))
+	assert.Equal(t, strconv.Itoa(httpStatus), scimErr.Status)
+	return AssertedScimError{scimErr} // wrap it, otherwise error handling is enforced
+}