Chore: Convert API tests to standard Go lib (#29009)

* Chore: Convert tests to standard Go lib

Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>

Co-authored-by: Will Browne <wbrowne@users.noreply.github.com>

pkg/api/pluginproxy/ds_auth_provider.go

@@ -13,7 +13,7 @@ import (
 	"golang.org/x/oauth2/google"
 )
 
-// ApplyRoute should use the plugin route data to set auth headers and custom headers
+// ApplyRoute should use the plugin route data to set auth headers and custom headers.
 func ApplyRoute(ctx context.Context, req *http.Request, proxyPath string, route *plugins.AppPluginRoute, ds *models.DataSource) {
 	proxyPath = strings.TrimPrefix(proxyPath, route.Path)