minor #47732 [TwigBridge] Adding the new block form_label_content for bootstrap 5 layout (Yoann-TYT)

This PR was merged into the 6.2 branch.

Discussion
----------

[TwigBridge] Adding the new block form_label_content for bootstrap 5 layout

| Q             | A
| ------------- | ---
| Branch?       | 6.2
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Tickets       | Fix #... <!-- prefix each issue number with "Fix #", no need to create an issue if none exist, explain below instead -->
| License       | MIT
| Doc PR        | symfony/symfony-docs#... <!-- required for new features -->
<!--
Replace this notice by a short README for your feature/bugfix.
This will help reviewers and should be a good start for the documentation.

Additionally (see https://symfony.com/releases):
 - Always add tests and ensure they pass.
 - Bug fixes must be submitted against the lowest maintained branch where they apply
   (lowest branches are regularly merged to upper ones so they get the fixes too).
 - Features and deprecations must be submitted against the latest branch.
 - For new features, provide some code snippets to help understand usage.
 - Changelog entry should follow https://symfony.com/doc/current/contributing/code/conventions.html#writing-a-changelog-entry
 - Never break backward compatibility (see https://symfony.com/bc).
-->

Adding the new block `form_label_content` for `bootstrap_5_layout.html.twig` to simplify it
Linked to [[TwigBridge] Add form_label_content and form_help_content block to form_div_layout](symfony/symfony#45985)

Commits
-------

c2b9becda4 adding the new block form_label_content for bootstrap_5_layout.html.twig to simplify it

Author: fabpot

Resources/views/Form/bootstrap_5_layout.html.twig

@@ -308,33 +308,11 @@
         {%- if parent_label_class is defined -%}
             {%- set label_attr = label_attr|merge({class: (label_attr.class|default('') ~ ' ' ~ parent_label_class)|replace({'checkbox-inline': '', 'radio-inline': ''})|trim}) -%}
         {%- endif -%}
-        {%- if label is not same as(false) and label is empty -%}
-            {%- if label_format is not empty -%}
-                {%- set label = label_format|replace({
-                    '%name%': name,
-                    '%id%': id,
-                }) -%}
-            {%- else -%}
-                {%- set label = name|humanize -%}
-            {%- endif -%}
-        {%- endif -%}
 
         {{ widget|raw }}
         <label{% with { attr: label_attr } %}{{ block('attributes') }}{% endwith %}>
             {%- if label is not same as(false) -%}
-                {%- if translation_domain is same as(false) -%}
-                    {%- if label_html is same as(false) -%}
-                        {{- label -}}
-                    {%- else -%}
-                        {{- label|raw -}}
-                    {%- endif -%}
-                {%- else -%}
-                    {%- if label_html is same as(false) -%}
-                        {{- label|trans(label_translation_parameters, translation_domain) -}}
-                    {%- else -%}
-                        {{- label|trans(label_translation_parameters, translation_domain)|raw -}}
-                    {%- endif -%}
-                {%- endif -%}
+                {{- block('form_label_content') -}}
             {%- endif -%}
         </label>
     {%- endif -%}