Clang format check not properly working for code behind compiler directives

I've been battling Clang format for a larger PR and it seems that the Clang format check is not properly working for code that is guarded by a compiler define.

E.g. this code:

```cpp
#ifdef SOMETHING
#else
VkRenderPassBeginInfo render_pass_begin_info = vkb::initializers::render_pass_begin_info();
render_pass_begin_info.renderPass = render_pass;
render_pass_begin_info.renderArea.offset.x = 0;
render_pass_begin_info.renderArea.offset.y = 0;
render_pass_begin_info.renderArea.extent.width = width;
render_pass_begin_info.renderArea.extent.height = height;
render_pass_begin_info.clearValueCount = 5;
render_pass_begin_info.pClearValues = clear_values;
render_pass_begin_info.framebuffer = framebuffers[current_image_index];
#endif
```

Triggers a Clang format CI failrure, even though the formatting was chnaged like that Clang format itself. And this looks exactly like our formatting guidelines

Reverting this by hand to look like this:

```cpp
#ifdef SOMETHING
#else
VkRenderPassBeginInfo render_pass_begin_info = vkb::initializers::render_pass_begin_info();
render_pass_begin_info.renderPass = render_pass;
render_pass_begin_info.renderArea.offset.x = 0;
render_pass_begin_info.renderArea.offset.y = 0;
render_pass_begin_info.renderArea.extent.width = width;
render_pass_begin_info.renderArea.extent.height = height;
render_pass_begin_info.clearValueCount = 5;
render_pass_begin_info.pClearValues = clear_values;
render_pass_begin_info.framebuffer = framebuffers[current_image_index];
```

Fixes CI.

IMO that's wrong and needs to be fixed, otherwise every time I do a local Clang format for files changed I need to wait for CI to fail, decipher a cryptic message and manually fix stuff again.

Start by inspecting the repository's Clang-format check configuration and the CI entry point that formats changed C++ files. Reproduce the check with the shown #ifdef/#else snippet, then verify that locally formatted code behind compiler directives passes CI without manual reformatting.

Written by the indexing model from the issue text.