Add proxy-send-timeout to configmap key and annotation

[LorcanMcVeigh]

Allow the admin/user to configure the send timeout for https using proxy_send_timeout directive or for gRPC services using grpc_send_timeout directive.

Checklist

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• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto master
• I will ensure my PR is targeting the master branch and pulling from my branch from my own fork

[pleshakov]

@LorcanMcVeigh
Looks good.

Please add ProxySendTimeout here https://github.com/nginxinc/kubernetes-ingress/blob/c03735c6fa580c1ca8e1692ed46c7f0b41cfaff3/internal/configs/version1/templates_test.go#L60

Have you tested how this change affects VS/VSR upstreams? The expected behavior is that the ConfigMap now sets the default send-timeout for Upstreams https://github.com/nginxinc/kubernetes-ingress/blob/master/docs/virtualserver-and-virtualserverroute.md#Upstream Please make sure it is the case and update the documentation for the send-timeout field accordingly.

[LorcanMcVeigh]

@LorcanMcVeigh
Looks good.

Please add ProxySendTimeout here

https://github.com/nginxinc/kubernetes-ingress/blob/c03735c6fa580c1ca8e1692ed46c7f0b41cfaff3/internal/configs/version1/templates_test.go#L60

Have you tested how this change affects VS/VSR upstreams? The expected behavior is that the ConfigMap now sets the default send-timeout for Upstreams https://github.com/nginxinc/kubernetes-ingress/blob/master/docs/virtualserver-and-virtualserverroute.md#Upstream Please make sure it is the case and update the documentation for the send-timeout field accordingly.

yes that works and i've updated the docs

[Rulox]

lgtm except for a small typo in the doc I think.

[Dean-Coakley]

Looks good. Tested using ingress resource, and also with using vs/vsrs. Appears to be in working order

[pleshakov]

Looks good. But please fix the typo mentioned in https://github.com/nginxinc/kubernetes-ingress/pull/616/files#r300727258

[Rulox]

👍