Enable Sentry for the engine if the conan con sentry_url is set

If you want to test this locally do a conan install with:

```
-c user.curaengine:sentry_url=<sentry_url>
```

The URL is stored in the CuraEngine repository variables

Contributes to CURA-11364

conanfile.py

@@ -306,6 +306,8 @@ class CuraConan(ConanFile):
         self.options["boost"].header_only = True
         if self.settings.os == "Linux":
             self.options["curaengine_grpc_definitions"].shared = True
+        if self.conf.get("user.curaengine:sentry_url", "", check_type = str) != "":
+            self.options["curaengine"].enable_sentry = True
 
     def validate(self):
         version = self.conf_info.get("user.cura:version", default = self.version, check_type = str)