test(e2e): Add test for when an incorrect tag is used in a dynamic host catalog (#2731)

* refact(e2e): Move Dynamic Host Catalog env to its own file

This keeps each scenario consistent (an env_test.go file in each directory)

* refact(e2e): Update to use type casting

* refact(e2e): Rename existing dynamic host catalog test

* test(e2e): Add test for an empty dynamic host catalog

This test verifies that you fail to connect to a target with an empty host set (in a dynamic host catalog)

* fix(e2e): Update return statement since we know err is nil

* fix(e2e): Add ok checks in type assertions

testing/internal/e2e/tests/database/migration_test.go

@@ -273,7 +273,8 @@ func populateBoundaryDatabase(t testing.TB, ctx context.Context, c *config, te T
 	var authenticationResult boundary.AuthenticateCliOutput
 	err = json.Unmarshal(buf.Bytes(), &authenticationResult)
 	require.NoError(t, err)
-	auth_token := authenticationResult.Item.Attributes["token"].(string)
+	auth_token, ok := authenticationResult.Item.Attributes["token"].(string)
+	require.True(t, ok)
 
 	connectTarget := infra.ConnectToTarget(t, te.Pool, te.Network, te.Boundary.UriNetwork, auth_token, newTargetId)
 	t.Cleanup(func() {