Chore: Homogenize pkg docs comment block format (#4603)

Author: joanlopez

internal/js/doc.go

@@ -1,5 +1,3 @@
-/*
-Package js is the JavaScript implementation of the lib.Runner and relative concepts for
-executing concurrent-safe JavaScript code.
-*/
+// Package js is the JavaScript implementation of the lib.Runner and relative concepts for
+// executing concurrent-safe JavaScript code.
 package js

output/csv/doc.go

@@ -1,4 +1,2 @@
-/*
-Package csv implements an output writing metrics in csv format
-*/
+// Package csv implements an output writing metrics in csv format
 package csv