[esp32_hosted] Add HTTP-based coprocessor firmware update support (#13090)

Co-authored-by: Claude <noreply@anthropic.com>

tests/components/esp32_hosted/test-embedded.esp32-p4-idf.yaml

@@ -3,5 +3,6 @@
 update:
   - platform: esp32_hosted
     name: "Coprocessor Firmware Update"
+    type: embedded
     path: $component_dir/test_firmware.bin
     sha256: de2f256064a0af797747c2b97505dc0b9f3df0de4f489eac731c23ae9ca9cc31

tests/components/esp32_hosted/test-http.esp32-p4-idf.yaml

@@ -0,0 +1,10 @@
+<<: !include common.yaml
+
+http_request:
+
+update:
+  - platform: esp32_hosted
+    name: "Coprocessor Firmware Update"
+    type: http
+    source: https://esphome.github.io/esp-hosted-firmware/manifest/esp32c6.json
+    update_interval: 6h