chore: Update flutter to 3.7.10 and switch to self hosted cirruslabs image

.gitlab-ci.yml

@@ -1,7 +1,7 @@
 variables:
-  FLUTTER_VERSION: 3.7.7
+  FLUTTER_VERSION: 3.7.10
 
-image: cirrusci/flutter:${FLUTTER_VERSION}
+image: ghcr.io/cirruslabs/flutter:${FLUTTER_VERSION}
 
 .shared_windows_runners:
   tags:
@@ -88,7 +88,6 @@ integration_test:
 # integration tests for Linux builds
 ### disabled because of Linux headless issues
 .integration_test_linux:
-  image: cirrusci/flutter:${FLUTTER_VERSION}
   extends: integration_test
   parallel:
     matrix:

Dockerfile

@@ -1,4 +1,4 @@
-FROM cirrusci/flutter as builder
+FROM ghcr.io/cirruslabs/flutter as builder
 RUN sudo apt update && sudo apt install curl -y
 COPY . /app
 WORKDIR /app