Address SendGrid connector review feedback

- Add SendGrid third-party logo and wire it into ThirdPartyLogo
- Add SendGrid name resolver (account company name, graceful fallback)
- Fix MFA detection: full-access teammates carry both 2fa_exempt and
  2fa_required, so report Unknown unless exactly one is present
- Re-record the driver cassette against the live API
- Use a random time suffix for the migration filename

Signed-off-by: Aurélien Sibiril <81782+aureliensibiril@users.noreply.github.com>

pkg/connector/provider/sendgrid.go

@@ -32,5 +32,8 @@ func sendgridRegistration() *Registration {
 		NewDriver: func(_ context.Context, c *http.Client, _ *coredata.Connector, _ *log.Logger) (drivers.Driver, error) {
 			return drivers.NewSendGridDriver(c), nil
 		},
+		NewNameResolver: func(_ context.Context, c *http.Client, _ *coredata.Connector, _ *log.Logger) drivers.NameResolver {
+			return drivers.NewSendGridNameResolver(c)
+		},
 	}
 }