Phlare: Add devenv block (#60911)

Add Phlare devenv block

devenv/docker/blocks/phlare/docker-compose.yaml

@@ -0,0 +1,8 @@
+  phlare:
+    image: grafana/phlare:latest
+    command:
+      - --config.file=/etc/phlare.yaml
+    ports:
+      - 4100:4100
+    volumes:
+      - ./docker/blocks/phlare/phlare.yaml:/etc/phlare.yaml

devenv/docker/blocks/phlare/phlare.yaml

@@ -0,0 +1,5 @@
+scrape_configs:
+  - job_name: "default"
+    scrape_interval: "15s"
+    static_configs:
+      - targets: ["127.0.0.1:4100"]