Rebrand various CI scripts and modules

This replaces Riot with Element in various CI scripts, modules, parameters, etc.
This _should_ be the last major rebranding pass (hopefully).

Fixes https://github.com/vector-im/element-web/issues/14894

test/end-to-end-tests/element/config-template/config.json

@@ -0,0 +1,30 @@
+{
+    "default_hs_url": "http://localhost:5005",
+    "default_is_url": "https://vector.im",
+    "disable_custom_urls": false,
+    "disable_guests": false,
+    "disable_login_language_selector": false,
+    "disable_3pid_login": false,
+    "brand": "Element",
+    "integrations_ui_url": "https://scalar.vector.im/",
+    "integrations_rest_url": "https://scalar.vector.im/api",
+    "bug_report_endpoint_url": "https://element.io/bugreports/submit",
+    "showLabsSettings": true,
+    "default_federate": true,
+    "welcomePageUrl": "home.html",
+    "default_theme": "light",
+    "roomDirectory": {
+        "servers": [
+            "localhost:5005"
+        ]
+    },
+    "piwik": {
+        "url": "https://piwik.riot.im/",
+        "whitelistedHSUrls": ["http://localhost:5005"],
+        "whitelistedISUrls": ["https://vector.im", "https://matrix.org"],
+        "siteId": 1
+    },
+    "enable_presence_by_hs_url": {
+        "https://matrix.org": false
+    }
+}