Log responses for 503 (#3012)

Currently we were logging rate limiting values for 503 which is not available and end up with empty values. Switching it to logging the response, similar to 404 as that can be more useful.

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- [ ] 🐛 Bugfix
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src/internal/connector/graph/service.go

@@ -319,13 +319,13 @@ func (handler *LoggingMiddleware) Intercept(
 	msg := fmt.Sprintf("graph api error: %s", resp.Status)
 
 	// special case for supportability: log all throttling cases.
-	if resp.StatusCode == http.StatusTooManyRequests || resp.StatusCode == http.StatusServiceUnavailable {
+	if resp.StatusCode == http.StatusTooManyRequests {
 		log = log.With(
 			"limit", resp.Header.Get(rateLimitHeader),
 			"remaining", resp.Header.Get(rateRemainingHeader),
 			"reset", resp.Header.Get(rateResetHeader),
 			"retry-after", resp.Header.Get(retryAfterHeader))
-	} else if resp.StatusCode/100 == 4 {
+	} else if resp.StatusCode/100 == 4 || resp.StatusCode == http.StatusServiceUnavailable {
 		log = log.With("response", getRespDump(ctx, resp, true))
 	}