refactor: Move integration tests from 'examples/' into 'tests/' (#5367)

This change moves `examples/example` into `tests/conan` to make it clear it is an integration test, and adjusts the `conan` CI job accordingly

.github/workflows/clang-format.yml

@@ -20,7 +20,7 @@ jobs:
         sudo apt-get update
         sudo apt-get install clang-format-${CLANG_VERSION}
     - name: Format first-party sources
-      run: find include src -type f \( -name '*.cpp' -o -name '*.hpp' -o -name '*.h' -o -name '*.ipp' \) -not -path "src/magic/magic_enum.h" -exec clang-format-${CLANG_VERSION} -i {} +
+      run: find include src tests -type f \( -name '*.cpp' -o -name '*.hpp' -o -name '*.h' -o -name '*.ipp' \) -not -path "src/magic/magic_enum.h" -exec clang-format-${CLANG_VERSION} -i {} +
     - name: Check for differences
       id: assert
       run: |