fix: Bump golangci-lint version and fix some linter's problems

.golangci.yml

Makefile

connector/atlassiancrowd/atlassiancrowd.go

connector/google/google.go

connector/ldap/ldap.go

connector/saml/saml.go

server/deviceflowhandlers_test.go

server/handlers.go

server/templates.go

storage/kubernetes/types.go

storage/sql/crud.go

storage/storage.go