chore(lint): upgrade golangci-lint to v1.49.0

- Add linter `interfacebloat` and fix code issues
- Add linter `reassign`
- Remove deprecated linter `nosnakecase`

internal/vpn/interfaces.go

@@ -43,12 +43,24 @@ type Storage interface {
 
 type NetLinker interface {
 	AddrAdd(link netlink.Link, addr *netlink.Addr) error
+	Router
+	Ruler
+	Linker
 	IsWireguardSupported() (ok bool, err error)
+}
+
+type Router interface {
 	RouteList(link netlink.Link, family int) (
 		routes []netlink.Route, err error)
 	RouteAdd(route *netlink.Route) error
+}
+
+type Ruler interface {
 	RuleAdd(rule *netlink.Rule) error
 	RuleDel(rule *netlink.Rule) error
+}
+
+type Linker interface {
 	LinkList() (links []netlink.Link, err error)
 	LinkByName(name string) (link netlink.Link, err error)
 	LinkAdd(link netlink.Link) (err error)