feat: allow selecting a resource using its ID (#361)

##### SUMMARY

Allow referring to resources using their IDs for:
- hcloud_load_balancer_network
- hcloud_load_balancer_service
- hcloud_load_balancer_target
- hcloud_rdns
- hcloud_route
- hcloud_server_network
- hcloud_subnetwork


##### ISSUE TYPE

- Feature Pull Request


##### COMPONENT NAME
- hcloud_load_balancer_network
- hcloud_load_balancer_service
- hcloud_load_balancer_target
- hcloud_rdns
- hcloud_route
- hcloud_server_network
- hcloud_subnetwork

tests/integration/targets/hcloud_load_balancer_network/tasks/test.yml

@@ -59,7 +59,7 @@
   assert:
     that:
       - result is failed
-      - "result.msg == 'Load balancer does not exist: does-not-exist'"
+      - "result.msg == 'resource (load_balancer) does not exist: does-not-exist'"
 
 - name: test fail network does not exist
   hetzner.hcloud.hcloud_load_balancer_network:
@@ -72,7 +72,7 @@
   assert:
     that:
       - result is failed
-      - "result.msg == 'Network does not exist: does-not-exist'"
+      - "result.msg == 'resource (network) does not exist: does-not-exist'"
 
 - name: test create load_balancer network with checkmode
   hetzner.hcloud.hcloud_load_balancer_network:

tests/integration/targets/hcloud_load_balancer_service/tasks/test.yml

@@ -25,7 +25,7 @@
   assert:
     that:
       - result is failed
-      - "result.msg == 'Load balancer does not exist: does-not-exist'"
+      - "result.msg == 'resource (load_balancer) does not exist: does-not-exist'"
 
 - name: test create load_balancer service with checkmode
   hetzner.hcloud.hcloud_load_balancer_service:

tests/integration/targets/hcloud_load_balancer_target/tasks/test.yml

@@ -37,7 +37,7 @@
   assert:
     that:
       - result is failed
-      - "result.msg == 'Load balancer does not exist: does-not-exist'"
+      - "result.msg == 'resource (load_balancer) does not exist: does-not-exist'"
 
 - name: test fail server does not exist
   hetzner.hcloud.hcloud_load_balancer_target:
@@ -50,7 +50,7 @@
   assert:
     that:
       - result is failed
-      - "result.msg == 'Server not found: does-not-exist'"
+      - "result.msg == 'resource (server) does not exist: does-not-exist'"
 
 - name: test create load_balancer target with checkmode
   hetzner.hcloud.hcloud_load_balancer_target:

tests/integration/targets/hcloud_rdns/tasks/test.yml

@@ -70,7 +70,7 @@
   assert:
     that:
       - result is failed
-      - 'result.msg == "The selected server does not exist"'
+      - 'result.msg == "resource (server) does not exist: not-existing"'
 - name: test create rdns
   hetzner.hcloud.hcloud_rdns:
     server: "{{ hcloud_server_name }}"