Run clang-format and enable CI check for it (#755)

* pre-commit: Update and enable clang-format check

There is newer version from clang-format so use that. We do not yet want
18 as that is little bit too new.

* Format some thing by hand which clang-format "breaks"

Clang-format will format some things little bit off in some cases.
Format some things by hand so we get cleaner end result.

* Run clang-format with

```
pre-commit run --all-files clang-format
```

We have already in previously checked places where clang-format does not
make good format and ignored those (hopefully most of the things).

---------

Co-authored-by: Kari Argillander <kari.argillander@fidelix.com>

test/bacnet/bacint/src/main.c

@@ -339,8 +339,9 @@ static void testBACnetSigned8(void)
         test_value = ~0U;
         len = decode_signed8(&apdu[0], &test_value);
         zassert_equal(value, test_value, NULL);
-        if (value == 127)
+        if (value == 127) {
             break;
+        }
     }
 }
 
@@ -376,8 +377,9 @@ static void testBACnetSigned16(void)
         test_value = ~0U;
         len = decode_signed16(&apdu[0], &test_value);
         zassert_equal(value, test_value, NULL);
-        if (value == 32767)
+        if (value == 32767) {
             break;
+        }
     }
 }