feature #1576 Upgrade to Symfony 7.3 (rosier)

This PR was squashed before being merged into the main branch.

Discussion
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Upgrade to Symfony 7.3

This updates all dependencies and upgrade to Symfony v7.3.0-RC1

Also fixes the following deprecations:
- The "errors.xml" routing configuration file is deprecated, import "errors.php" instead.
- The "profiler.xml" routing configuration file is deprecated, import "profile.php" instead.
- The "xdt.xml" routing configuration file is deprecated, import "xdt.php" instead.
- Not setting the "property_info.with_constructor_extractor" option explicitly is deprecated because its default value will change in version 8.0.
- The "App\Security\PostVoter::voteOnAttribute()" method will require a new "Vote|null $vote" argument in the next major version of its parent class "Symfony\Component\Security\Core\Authorization\Voter\Voter", not defining it is deprecated.

Commits
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79944c2 Upgrade to Symfony 7.3

Author: javiereguiluz

.editorconfig

@@ -1,19 +1,9 @@
-; top-most EditorConfig file
 root = true
 
-; Unix-style newlines
 [*]
 charset = utf-8
-end_of_line = LF
+end_of_line = lf
+indent_size = 4
+indent_style = space
 insert_final_newline = true
 trim_trailing_whitespace = true
-
-[*.{php,html,twig}]
-indent_style = space
-indent_size = 4
-
-[*.md]
-max_line_length = 80
-
-[COMMIT_EDITMSG]
-max_line_length = 0

composer.json

@@ -106,7 +106,7 @@
     "extra": {
         "symfony": {
             "allow-contrib": true,
-            "require": "7.2.*"
+            "require": "7.3.*"
         }
     }
 }