minor #903 [Site] 2.9 site deploy tweaks using AssetMapper ad Symfony 6.3 (weaverryan)

This PR was squashed before being merged into the 2.x branch.

Discussion
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[Site] 2.9 site deploy tweaks using AssetMapper ad Symfony 6.3

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| Tickets       | None
| License       | MIT

Hi!

Deploying with AssetMapper is pretty easy - this makes the last tweaks needed/wanted.

Cheers!

Commits
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b72d090 [Site] 2.9 site deploy tweaks using AssetMapper ad Symfony 6.3

Author: weaverryan

ux.symfony.com/.platform.app.yaml

@@ -5,8 +5,6 @@ type: php:8.1
 dependencies:
     php:
         composer/composer: "^2"
-    nodejs:
-        yarn: "1.22.17"
 
 build:
     flavor: none
@@ -49,13 +47,16 @@ hooks:
 
         curl -s https://get.symfony.com/cloud/configurator | (>&2 bash)
 
-        (>&2
-            symfony-build
-        )
+        (>&2 symfony-build)
+
+        php bin/console asset-map:compile
 
     deploy: |
         set -x -e
 
         (>&2 symfony-deploy)
 
         php bin/console app:load-data
+        # needed because StimulusBundle / asset mapper will currently
+        # expect this asset mapper directory to exist at runtime
+        mkdir var/translations

ux.symfony.com/assets/controllers.json

@@ -3,7 +3,7 @@
         "@symfony/ux-autocomplete": {
             "autocomplete": {
                 "enabled": true,
-                "fetch": "eager",
+                "fetch": "lazy",
                 "autoimport": {
                     "tom-select/dist/css/tom-select.default.css": false,
                     "tom-select/dist/css/tom-select.bootstrap5.css": true
@@ -44,7 +44,7 @@
         "@symfony/ux-live-component": {
             "live": {
                 "enabled": true,
-                "fetch": "eager",
+                "fetch": "lazy",
                 "autoimport": {
                     "@symfony/ux-live-component/dist/live.min.css": true
                 }
@@ -53,7 +53,7 @@
         "@symfony/ux-notify": {
             "notify": {
                 "enabled": true,
-                "fetch": "eager"
+                "fetch": "lazy"
             }
         },
         "@symfony/ux-react": {
@@ -71,7 +71,7 @@
         "@symfony/ux-swup": {
             "swup": {
                 "enabled": true,
-                "fetch": "eager"
+                "fetch": "lazy"
             }
         },
         "@symfony/ux-turbo": {