[FIX] website_event_meet: community page customize options

Steps to reproduce:
- Open an event and go to the Community page
- Try to customize it => traceback on clicking the 'Customize' tab.

Cause:
The `_getRpcData` function called by '_computeWidgetState' method does not exist
anymore since https://github.com/odoo/odoo/commit/03c5526

Fix:
This commit eliminates the call to the `_getRpcData` function and alters
the code of 'options.js' to get rpcData for the 'allow room creation' checkbox,
through an implementation similar to that of 'website menu'.

closes odoo/odoo#158684

Task: 3805901
X-original-commit: 1ea9c23eaaab15b6e29b73b9ec530fc9baec0726
Signed-off-by: Warnon Aurélien (awa) <awa@odoo.com>
Signed-off-by: Khushi Patel (khpa) <khpa@odoo.com>

addons/website_event_meet/static/src/js/snippets/options.js

@@ -4,6 +4,16 @@ import options from '@web_editor/js/editor/snippets.options';
 
 options.registry.WebsiteEvent.include({
 
+    /**
+     * @override
+     */
+    async start() {
+        const res = await this._super(...arguments);
+        const rpcData = await this.orm.read("event.event", [this.eventId], ["meeting_room_allow_creation"]);
+        this.meetingRoomAllowCreation = rpcData[0]['meeting_room_allow_creation'];
+        return res;
+    },
+
     //--------------------------------------------------------------------------
     // Options
     //--------------------------------------------------------------------------
@@ -12,7 +22,7 @@ options.registry.WebsiteEvent.include({
      * @see this.selectClass for parameters
      */
     allowRoomCreation(previewMode, widgetValue, params) {
-        this.orm.write(this.modelName, [this.eventId], {
+        this.orm.write("event.event", [this.eventId], {
             meeting_room_allow_creation: widgetValue,
         }).then(() => this.trigger_up('request_save', {reload: true, optionSelector: this.data.selector}));
     },
@@ -27,7 +37,7 @@ options.registry.WebsiteEvent.include({
     async _computeWidgetState(methodName, params) {
         switch (methodName) {
             case 'allowRoomCreation': {
-                return this._getRpcData('meeting_room_allow_creation');
+                return this.meetingRoomAllowCreation;
             }
         }
         return this._super(...arguments);