chore: trigger cc tests when changing one of the cc tests (#22098)

We will now trigger the cc tests if one of the `captures` test is
changed

Author: hamzaremmal

.github/workflows/test-cc.yml

@@ -10,6 +10,10 @@ on:
       - scala2-library-cc/**
       - scala2-library-cc-tasty/**
       - compiler/src/dotty/tools/dotc/cc/**
+      ## Capture Checking Tests
+      - tests/pos-custom-args/captures/**
+      - tests/run-custom-args/captures/**
+      - tests/neg-custom-args/captures/**
 
 env:
   DOTTY_CI_RUN: true