Merge branch 'secure-scanner-integration-recommend-debug-messages-for-cli' into 'master'

Recommend debug messages for CLIs scanners run

See merge request gitlab-org/gitlab!46210

doc/development/integrations/secure.md

@@ -248,6 +248,11 @@ It is recommended to use the `debug` level for verbose logging that could be
 useful when debugging. The default value for `SECURE_LOG_LEVEL` should be set
 to `info`.
 
+When executing command lines, scanners should use the `debug` level to log the command line and its output.
+For instance, the [bundler-audit](https://gitlab.com/gitlab-org/security-products/analyzers/bundler-audit) scanner
+uses the `debug` level to log the command line `bundle audit check --quiet`,
+and what `bundle audit` writes to the standard output.
+
 #### common logutil package
 
 If you are using [go](https://golang.org/) and