MM-61893 Replace usage of hasOwnProperty with Object.hasOwn (#29428)

* MM-61893 Replace usage of hasOwnProperty with Object.hasOwn

* Update type guard in messageToElement

* Replace a couple more hasOwnProperty calls

webapp/channels/src/plugins/index.js

@@ -235,7 +235,7 @@ export async function loadPluginsIfNecessary() {
 
     // Remove old plugins
     Object.keys(oldManifests).forEach((id) => {
-        if (!newManifests.hasOwnProperty(id)) {
+        if (!Object.hasOwn(newManifests, id)) {
             const oldManifest = oldManifests[id];
             removePlugin(oldManifest);
         }

webapp/channels/src/plugins/pluggable/pluggable.tsx

@@ -64,7 +64,7 @@ export default function Pluggable(props: Props): JSX.Element | null {
         ...otherProps
     } = props;
 
-    if (!pluggableName || !Object.hasOwnProperty.call(components, pluggableName)) {
+    if (!pluggableName || !Object.hasOwn(components, pluggableName)) {
         return null;
     }