Add configuration option to disable inlined CSS in SSR HTML

When inlining CSS, Angular Universal needs to extract critical styles.
This seems to take up a significant chunk of processing time.

However, loading may appear less smooth when this feature is disabled.

Added to the configuration to make it easier to A/B test this without a full re-build.

src/environments/environment.production.ts

@@ -7,6 +7,7 @@ export const environment: Partial<BuildConfig> = {
   universal: {
     preboot: true,
     async: true,
-    time: false
+    time: false,
+    inlineCriticalCss: true,
   }
 };

src/environments/environment.ts

@@ -12,7 +12,8 @@ export const environment: Partial<BuildConfig> = {
   universal: {
     preboot: false,
     async: true,
-    time: false
+    time: false,
+    inlineCriticalCss: true,
   }
 };