Bug 1957058 - Upgrade spotless to 7.0.2. r=geckoview-reviewers,owlish

Output directory is changed to spotless-clean or spotless-lints [*1].

* faa56fca88

Differential Revision: https://phabricator.services.mozilla.com/D243437

gradle/libs.versions.toml

@@ -101,7 +101,7 @@ adjust = "5.3.0"
 sentry = "8.8.0"
 
 commons-exec = "1.3"
-spotless = "6.25.0"
+spotless = "7.0.2"
 tomlj = "1.1.0"
 
 [libraries]