Address breaking change http.scheme -> url.scheme (open-telemetry/opentelemetry-collector-contrib#32814)

Author: crobert-1

tests/general/discoverymode/testdata/expected/docker-observer-internal-prometheus-expected.yaml

@@ -7,7 +7,7 @@ resourceMetrics:
         - key: container.name
           value:
             stringValue: nervous_brahmagupta
-        - key: http.scheme
+        - key: url.scheme
           value:
             stringValue: http
         - key: net.host.name

tests/general/discoverymode/testdata/expected/host-observer-internal-prometheus-expected.yaml

@@ -1,7 +1,7 @@
 resourceMetrics:
   - resource:
       attributes:
-        - key: http.scheme
+        - key: url.scheme
           value:
             stringValue: http
         - key: label_one

tests/general/testdata/internal_metrics_expected.yaml

@@ -1,7 +1,7 @@
 resourceMetrics:
   - resource:
       attributes:
-        - key: http.scheme
+        - key: url.scheme
           value:
             stringValue: http
         - key: net.host.port

tests/receivers/discovery/testdata/expected/host_observer-connected.yaml

@@ -67,7 +67,7 @@ resourceLogs:
                       - key: service_version
                         value:
                           stringValue: ""
-                      - key: http.scheme
+                      - key: url.scheme
                         value:
                           stringValue: http
                       - key: discovery.receiver.config

tests/receivers/envoy/testdata/expected.yaml

@@ -10,7 +10,7 @@ resourceMetrics:
         - key: discovery.endpoint.id
           value:
             stringValue: 30c5122db7a66a56ed6dce3b8ec50d8ccf12a8b3a217d92020e3560c4c13c3e4:9901
-        - key: http.scheme
+        - key: url.scheme
           value:
             stringValue: http
         - key: net.host.name

tests/receivers/envoy/testdata/expected_k8s.yaml

@@ -4,7 +4,7 @@ resourceMetrics:
         - key: discovery.endpoint.id
           value:
             stringValue: k8s_observer/aadd3afd-f140-4320-8259-5b25885cbb0a/admin(9901)
-        - key: http.scheme
+        - key: url.scheme
           value:
             stringValue: http
         - key: k8s.namespace.name

tests/receivers/kong/testdata/kong_metrics_expected.yaml

@@ -1,7 +1,7 @@
 resourceMetrics:
   - resource:
       attributes:
-        - key: http.scheme
+        - key: url.scheme
           value:
             stringValue: http
         - key: net.host.port