Remove use of deprecated functions

[dfawley]

https://pkg.go.dev/net/http#CloseNotifier

$ grep -r CloseNotifier
internal/transport/handler_server_test.go:				type onlyCloseNotifier interface {
internal/transport/handler_server_test.go:					http.CloseNotifier
internal/transport/handler_server_test.go:				return struct{ onlyCloseNotifier }{w.(onlyCloseNotifier)}

https://pkg.go.dev/crypto/x509#CertPool.Subjects

$ grep -r Roots.Subjects
credentials/tls/certprovider/store_test.go:	if gotR, wantR := got.Roots.Subjects(), want.Roots.Subjects(); !cmp.Equal(gotR, wantR, cmpopts.EquateEmpty()) {
credentials/tls/certprovider/pemfile/watcher_test.go:	if gotR, wantR := got.Roots.Subjects(), want.Roots.Subjects(); !cmp.Equal(gotR, wantR, cmpopts.EquateEmpty()) {

And corresponding ignores of those usages in vet.sh pending PR; should hopefully be submitted relatively soon.

[milencium]

Heey there, I would love to help on this, can I maybe be assigned ? Thanks in advance

[dfawley]

Sounds great, please send a PR; thanks!

[milencium]

@dfawley , thanks for this amazing opportunity, will do !

[zedGGs]

Heey @dfawley , could you assign me on this acc ? Im just using other acc, thank you