Replace all instances of fmt.Errorf(%v) with fmt.Errorf(%w) (#21551)

Found using
`find . -type f -name '*.go' -print -exec vim {} -c
':%s/fmt\.Errorf(\(.*\)%v\(.*\)err/fmt.Errorf(\1%w\2err/g' -c ':wq' \;`

Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

services/auth/source/smtp/auth.go

@@ -95,7 +95,7 @@ func Authenticate(a smtp.Auth, source *Source) error {
 	hasStartTLS, _ := client.Extension("STARTTLS")
 	if !source.UseTLS() && hasStartTLS {
 		if err = client.StartTLS(tlsConfig); err != nil {
-			return fmt.Errorf("failed to start StartTLS: %v", err)
+			return fmt.Errorf("failed to start StartTLS: %w", err)
 		}
 	}