Improve logging in scriptlets

[AdamWr]

In some scriptlets which replace content (like xml-prune, m3u-prune, trusted-replace-fetch-response, trusted-replace-node-text, trusted-replace-xhr-response, maybe in others too) it would be useful if there would be additional option to log content before and after modifying it. It would be helpful for debugging and creating rules.

Maybe related to - https://github.com/AdguardTeam/Scriptlets/issues/305