Add go2rtc and extend camera integration for better WebRTC support (#124410)

Dockerfile

@@ -44,4 +44,19 @@ RUN \
 # Home Assistant S6-Overlay
 COPY rootfs /
 
+# Needs to be redefined inside the FROM statement to be set for RUN commands
+ARG BUILD_ARCH
+# Get go2rtc binary
+RUN \
+    case "${BUILD_ARCH}" in \
+        "aarch64") go2rtc_suffix='arm64' ;; \
+        "armhf") go2rtc_suffix='armv6' ;; \
+        "armv7") go2rtc_suffix='arm' ;; \
+        *) go2rtc_suffix=${BUILD_ARCH} ;; \
+    esac \
+    && curl -L https://github.com/AlexxIT/go2rtc/releases/download/v1.9.4/go2rtc_linux_${go2rtc_suffix} --output /bin/go2rtc \
+    && chmod +x /bin/go2rtc \
+    # Verify go2rtc can be executed
+    && go2rtc --version
+
 WORKDIR /config