add freestanding test CI config

Author: wusatosi

.github/workflows/ci_tests.yml

@@ -55,6 +55,8 @@ jobs:
             args: "-DCMAKE_CXX_FLAGS=-fsanitize=thread"
           - description: "ASan"
             args: "-DCMAKE_CXX_FLAGS='-fsanitize=address -fsanitize=undefined'"
+          - description: "delete freestanding"
+            args: "-DBEMAN_INPLACE_VECTOR_FREESTANDING_DELETED=ON"
         include:
           - platform: ubuntu-24.04
             compiler: