minor symfony#54890 [DependencyInjection] Improve error message when a class in not instantiable during auto-discovery (HMRDevil)

This PR was merged into the 7.2 branch.

Discussion
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[DependencyInjection] Improve error message when a class in not instantiable during auto-discovery

| Q             | A
| ------------- | ---
| Branch?       | 7.2
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Issues        | Fix symfony#53651
| License       | MIT

See symfony#53651

Commits
-------

08ef880 change error msg

Author: fabpot

src/Symfony/Component/DependencyInjection/Compiler/AutowirePass.php

@@ -631,7 +631,7 @@ private function createTypeNotFoundMessage(TypedReference $reference, string $la
             }
 
             if ($r->isInterface() && !$alternatives) {
-                $message .= ' Did you create a class that implements this interface?';
+                $message .= ' Did you create an instantiable class that implements this interface?';
             }
         }
 

src/Symfony/Component/DependencyInjection/Tests/Compiler/AutowirePassTest.php

@@ -245,7 +245,7 @@ public function testTypeNotGuessableNoServicesFound()
             $pass->process($container);
             $this->fail('AutowirePass should have thrown an exception');
         } catch (AutowiringFailedException $e) {
-            $this->assertSame('Cannot autowire service "a": argument "$collision" of method "Symfony\Component\DependencyInjection\Tests\Compiler\CannotBeAutowired::__construct()" references interface "Symfony\Component\DependencyInjection\Tests\Compiler\CollisionInterface" but no such service exists. Did you create a class that implements this interface?', (string) $e->getMessage());
+            $this->assertSame('Cannot autowire service "a": argument "$collision" of method "Symfony\Component\DependencyInjection\Tests\Compiler\CannotBeAutowired::__construct()" references interface "Symfony\Component\DependencyInjection\Tests\Compiler\CollisionInterface" but no such service exists. Did you create an instantiable class that implements this interface?', (string) $e->getMessage());
         }
     }
 
@@ -819,7 +819,7 @@ public function testInterfaceWithNoImplementationSuggestToWriteOne()
             $pass->process($container);
             $this->fail('AutowirePass should have thrown an exception');
         } catch (AutowiringFailedException $e) {
-            $this->assertSame('Cannot autowire service "my_service": argument "$i" of method "Symfony\Component\DependencyInjection\Tests\Compiler\K::__construct()" references interface "Symfony\Component\DependencyInjection\Tests\Compiler\IInterface" but no such service exists. Did you create a class that implements this interface?', (string) $e->getMessage());
+            $this->assertSame('Cannot autowire service "my_service": argument "$i" of method "Symfony\Component\DependencyInjection\Tests\Compiler\K::__construct()" references interface "Symfony\Component\DependencyInjection\Tests\Compiler\IInterface" but no such service exists. Did you create an instantiable class that implements this interface?', (string) $e->getMessage());
         }
     }