fix: improve loggings for config recovery (#1414)

Author: junfuchen99

src/main/java/com/aws/greengrass/config/ConfigurationReader.java

@@ -113,7 +113,7 @@ private static void mergeTLogInto(Configuration c, Path p) throws IOException {
     public static boolean validateTlog(Path tlogPath) {
         try {
             if (!Files.exists(tlogPath)) {
-                logger.atError().setEventType("validate-tlog").kv("path", tlogPath)
+                logger.atDebug().setEventType("validate-tlog").kv("path", tlogPath)
                         .log("Transaction log file does not exist at given path");
                 return false;
             }

src/main/java/com/aws/greengrass/lifecyclemanager/KernelLifecycle.java

@@ -388,7 +388,9 @@ private void readConfigFromBackUpTLog(Path transactionLogPath, Path bootstrapTlo
                 return;
             }
         }
-        logger.atError().log("Transaction log {} is invalid and no usable backup exists", transactionLogPath);
+        logger.atWarn().log("Transaction log {} is invalid and no usable backup transaction log exists. Either an "
+                        + "initial Nucleus setup is ongoing or all config tlogs were corrupted",
+                transactionLogPath);
     }
 
     @SuppressWarnings("PMD.CloseResource")