Replace ImageMagick with a custom tool written in swift.

ci_scripts/ci_common.sh

@@ -31,11 +31,6 @@ setup_xcode_cloud_environment () {
 
 install_xcode_cloud_brew_dependencies () {
     brew update && brew install xcodegen
-    
-    if [ "$CI_WORKFLOW" = "Nightly" ]; then
-        brew install imagemagick@6
-        brew link imagemagick@6 # imagemagick@6 is keg-only, which means it was not symlinked into /usr/local,
-    fi
 }
 
 setup_github_actions_environment() {
@@ -44,11 +39,6 @@ setup_github_actions_environment() {
     
     brew update && brew install xcodegen swiftformat git-lfs a7ex/homebrew-formulae/xcresultparser
     
-    if [ "$CI_WORKFLOW" = "PR_BUILD" ]; then
-        brew install imagemagick@6
-        brew link imagemagick@6 # imagemagick@6 is keg-only, which means it was not symlinked into /usr/local,
-    fi
-    
     # brew "swiftlint" # Fails on the CI: `Target /usr/local/bin/swiftlint Target /usr/local/bin/swiftlint already exists`. Installed through https://github.com/actions/virtual-environments/blob/main/images/macos/macos-12-Readme.md#linters
 
     bundle config path vendor/bundle