Networking uses improper style for TLS protocol

[jeffmendoza]

networking/v1alpha3/gateway.proto:306:7:Field name "TLSv1_0" must be UPPER_SNAKE_CASE.
networking/v1alpha3/gateway.proto:309:7:Field name "TLSv1_1" must be UPPER_SNAKE_CASE.
networking/v1alpha3/gateway.proto:312:7:Field name "TLSv1_2" must be UPPER_SNAKE_CASE.
networking/v1alpha3/gateway.proto:315:7:Field name "TLSv1_3" must be UPPER_SNAKE_CASE.

Please fix if possible and remove lint exception below. Thanks.

https://github.com/istio/api/blob/master/prototool.yaml#L9

[jeffmendoza]

cc @ijsnellf @rshriram
Do you know if this shipped in Istio already?

[istio-policy-bot]

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