please consider creating "regular" class (without static methods). This class would take tracker and log_level as the arguments to the constructor. Also maybe ClickTrackingaSctiptsProvider would be more accurate name.

If you return "this" in the constructor you can do something like this:

new ClickTrackingScriptsProvider(tracker, logLevel).trackerInstallation;

or you can use getters for each script:

new ClickTrackingScriptsProvider(tracker, logLevel).getTrackerInstallationScript();