multi: rename nolint:lll to nolint:ll

Find and replace all nolint instances refering to the `lll` linter and
replace with `ll` which is the name of our custom version of the `lll`
linter which can be used to ignore log lines during linting.

The next commit will do the configuration of the custom linter and
disable the default one.

lncfg/wtclient.go

@@ -9,7 +9,7 @@ import (
 
 // WtClient holds the configuration options for the daemon's watchtower client.
 //
-//nolint:lll
+//nolint:ll
 type WtClient struct {
 	// Active determines whether a watchtower client should be created to
 	// back up channel states with registered watchtowers.