minor #24840 [TwigBundle] Add default Twig templates path as a container param (emodric)

This PR was merged into the 3.4 branch.

Discussion
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[TwigBundle] Add default Twig templates path as a container param

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #24839
| License       | MIT
| Doc PR        | N/A

Adds a `twig.default_path` container param for easier access to this config in compiler passes.

Commits
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81b38ec215 [TwigBundle] Add default Twig templates path as a container param

src/Symfony/Bundle/TwigBundle/DependencyInjection/TwigExtension.php

@@ -87,6 +87,7 @@ class TwigExtension extends Extension
         $container->setParameter('twig.exception_listener.controller', $config['exception_controller']);
 
         $container->setParameter('twig.form.resources', $config['form_themes']);
+        $container->setParameter('twig.default_path', $config['default_path']);
 
         $envConfiguratorDefinition = $container->getDefinition('twig.configurator.environment');
         $envConfiguratorDefinition->replaceArgument(0, $config['date']['format']);