chore: Enable DCM rule: avoid-collection-methods-with-unrelated-types (…

…#2721)

Enable DCM rule: avoid-collection-methods-with-unrelated-types

Reference:
https://dcm.dev/docs/rules/common/avoid-collection-methods-with-unrelated-types/

packages/flame_lint/lib/analysis_options_with_dcm.yaml

@@ -7,5 +7,6 @@ dart_code_metrics:
   # dart rules
     - avoid-banned-imports
     - avoid-cascade-after-if-null
+    - avoid-collection-methods-with-unrelated-types
   # flutter rules
     - prefer-define-hero-tag