Suppress inspections on assertions helper

This commit adds comments to org.elasticsearch.Assertions that disables
IntelliJ from complaining about using assert with side-effects, and
using constant conditions there as the side-effect with a constant
condition is intentionally employed.

core/src/main/java/org/elasticsearch/Assertions.java

@@ -38,7 +38,9 @@ public final class Assertions {
          * If assertions are enabled, the following line will be evaluated and enabled will have the value true, otherwise when assertions
          * are disabled enabled will have the value false.
          */
+        // noinspection ConstantConditions,AssertWithSideEffects
         assert enabled = true;
+        // noinspection ConstantConditions
         ENABLED = enabled;
     }