TUN-8585: Avoid creating GH client when dry-run is true

- copy exe files from windows build

.teamcity/package-windows.sh

@@ -15,4 +15,5 @@ for arch in ${windowsArchs[@]}; do
     make cloudflared-msi
     # Copy msi into final directory
     mv cloudflared-$VERSION-$arch.msi $FINAL_ARTIFACT_DIR/cloudflared-windows-$arch.msi
+    cp $BUILT_ARTIFACT_DIR/cloudflared-windows-$arch.exe $FINAL_ARTIFACT_DIR/cloudflared-windows-$arch.exe 
 done

github_release.py

@@ -214,9 +214,6 @@ def main():
     """ Attempts to upload Asset to Github Release. Creates Release if it doesn't exist """
     try:
         args = parse_args()
-        client = Github(args.api_key)
-        repo = client.get_repo(CLOUDFLARED_REPO)
-        release = get_or_create_release(repo, args.release_version, args.dry_run)
 
         if args.dry_run:
             if os.path.isdir(args.path):
@@ -229,6 +226,10 @@ def main():
             else:
                 logging.error("dryrun failed")
             return
+        else:
+            client = Github(args.api_key)
+            repo = client.get_repo(CLOUDFLARED_REPO)
+            release = get_or_create_release(repo, args.release_version, args.dry_run)
 
             if os.path.isdir(args.path):
                 onlyfiles = [f for f in listdir(args.path) if isfile(join(args.path, f))]