Resolve revive package-comments linter errors #812
Description
Resolve the following lint errors:
Error: snapshotter/internal/integtest/stargz/fs/config/config.go:41:1: package-comments: should have a package comment (revive)
package config
^
Error: snapshotter/config/config.go:14:1: package-comments: should have a package comment (revive)
package config
^
Error: snapshotter/internal/mount/collection.go:14:1: package-comments: should have a package comment (revive)
package mount
Note: there might be more lurking