fix(ci-installer): remove setup icon dependency for ISCC

- build Inno installer without SetupIconFile to avoid code 2 failures in runner

- drop MyIconFile define and pass only essential defines

- make task description ASCII-only to avoid encoding issues

build.py

@@ -206,7 +206,6 @@ def build_installer():
         f"/DMyAppVersion={VERSION}",
         f"/DMySourceDir={os.path.abspath(DIST_DIR)}",
         f"/DMyOutputDir={os.path.abspath('dist')}",
-        f"/DMyIconFile={icon_abs_path}",
         os.path.abspath(INSTALLER_SCRIPT),
     ]
     try: