chore(ci): upgraded linter to 1.53.3 (#3079)

* chore(ci): upgraded linter to 1.53.3

This flagged a bunch of unused parameters, so the PR is larger than
usual, but 99% mechanical.

* separate lint CI task

* run Lint in separate CI

internal/serverapi/serverapi.go

@@ -123,8 +123,6 @@ type CheckRepositoryExistsRequest struct {
 }
 
 // ConnectRepositoryRequest contains request to connect to a repository.
-//
-//nolint:musttag // false positive
 type ConnectRepositoryRequest struct {
 	Storage             blob.ConnectionInfo `json:"storage"`
 	Password            string              `json:"password"`