opentelemetry-docker-tests: add Prometheus exporter docker tests

.changelog/5457.added

@@ -0,0 +1 @@
+`opentelemetry-docker-tests`: add Prometheus exporter docker tests

tests/opentelemetry-docker-tests/tests/collector-config.yaml

@@ -5,6 +5,13 @@ receivers:
         endpoint: 0.0.0.0:4317
       http:
         endpoint: 0.0.0.0:4318
+  prometheus:
+    config:
+      scrape_configs:
+        - job_name: otel-python-e2e
+          scrape_interval: 1s
+          static_configs:
+            - targets: ['host.docker.internal:9464']
 
 exporters:
   otlphttp:
@@ -18,6 +25,9 @@ service:
     metrics:
       receivers: [otlp]
       exporters: [otlphttp]
+    metrics/prometheus:
+      receivers: [prometheus]
+      exporters: [otlphttp]
     logs:
       receivers: [otlp]
       exporters: [otlphttp]

tests/opentelemetry-docker-tests/tests/docker-compose.yml

@@ -6,7 +6,7 @@ services:
         - "8888:8888"
         - "55678:55678"
   otcollector:
-    image: otel/opentelemetry-collector:0.149.0
+    image: otel/opentelemetry-collector-contrib:0.156.0
     command: ["--config=/etc/otelcol/collector-config.yaml"]
     volumes:
       - ./collector-config.yaml:/etc/otelcol/collector-config.yaml