Add exclude-dir to check_is_private_key_nor_password_is_not_logged script

Because as can be observed there:
https://gitlab.syncad.com/hive/clive/-/jobs/1260490#L88

test-tools seems to log all envrionment variables which also include
CI_COMMIT_MESSAGE during CI and when e.g "password" text is used in
the commit name, there will be a false positive.

scripts/check_is_private_key_nor_password_is_not_logged.bash

@@ -3,6 +3,7 @@
 function find_password_private_keys() {
     grep \
         --include="latest.log*" \
+        --exclude-dir="*Node[0-9]" \
         -r -i -w  -E '(pass(word)?|[123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz]{51})' |
         grep "$@" -v -E '(Error in response from url|Problem occurred during communication with|test_tools.__private.logger)'
 }