Refactor: Unify indentation of preprocesor macros

[IMbackK]

Background Description

Currently all of these are used in different parts of this repo:

int func()
{
#    define foo
}

int func()
{
#define foo
}

int func()
{
    #define foo
}

this has caused confusion several times:
#15132 (comment)
#11362 (comment)

Our .clang-format specifies 1. and 2. is the most common.

I really dont like 1. but 2. and 3. are fine with me personally, i think we should clarify what the intended formatting is here and update .clang-format if needed.

Possible Refactor Approaches

update .clang-format and run an autoformating pass.

[github-actions]

This issue was closed because it has been inactive for 14 days since being marked as stale.