Use no-switch-default on clang

clang-18 improves this check so that we can actually use it.  Enable it
and fix all violations.

Change-Id: Ibe4ce19c423d447a4cbe593d1abba948362426af
Signed-off-by: Ed Tanous <ed@tanous.net>
diff --git a/http/routing.hpp b/http/routing.hpp
index 562abaf..921bfe8 100644
--- a/http/routing.hpp
+++ b/http/routing.hpp
@@ -319,7 +319,7 @@
                     case ParamType::PATH:
                         BMCWEB_LOG_DEBUG("<path>");
                         break;
-                    case ParamType::MAX:
+                    default:
                         BMCWEB_LOG_DEBUG("<ERROR>");
                         break;
                 }
diff --git a/http/verb.hpp b/http/verb.hpp
index 5eacfbe..5859d10 100644
--- a/http/verb.hpp
+++ b/http/verb.hpp
@@ -67,7 +67,7 @@
             return "PUT";
         case HttpVerb::Options:
             return "OPTIONS";
-        case HttpVerb::Max:
+        default:
             return "";
     }