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/reject/src/main.c

@@ -28,12 +28,14 @@ static int reject_decode_apdu(
 {
     int len = 0;
 
-    if (!apdu)
+    if (!apdu) {
         return -1;
+    }
     /* optional checking - most likely was already done prior to this call */
     if (apdu_len) {
-        if (apdu[0] != PDU_TYPE_REJECT)
+        if (apdu[0] != PDU_TYPE_REJECT) {
             return -1;
+        }
         if (apdu_len > 1) {
             len = reject_decode_service_request(
                 &apdu[1], apdu_len - 1, invoke_id, reject_reason);