Laravel: drop ext-opentelemetry hard requirement.

Author: ChrisLightfootWild

src/Instrumentation/Laravel/composer.json

@@ -11,7 +11,6 @@
   "require": {
     "php": "^8.1",
     "ext-json": "*",
-    "ext-opentelemetry": "*",
     "laravel/framework": "^10.0 || ^11.0",
     "open-telemetry/api": "^1.1",
     "open-telemetry/sem-conv": "^1.24"
@@ -43,6 +42,9 @@
       "OpenTelemetry\\Tests\\Contrib\\Instrumentation\\Laravel\\": "tests/"
     }
   },
+  "suggest": {
+    "ext-opentelemetry": "Required to provide auto-instrumentation hooks."
+  },
   "extra": {
     "spi-config": {
       "autoload-files": true