Add support for TLS curves in router deployment configuration

[richardsonnick]

To support new PQC curves, let's add a config for explicitly setting the supported groups.

ROUTER_CURVES is piped through OpenShift/router to HAProxy where it will be used by ssl-default-bind-curves

For more context see: openshift/router#678

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@richardsonnick: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/okd-scos-e2e-aws-ovn	a0154e9	link	false	/test okd-scos-e2e-aws-ovn
ci/prow/verify	a0154e9	link	true	/test verify
ci/prow/verify-deps	a0154e9	link	true	/test verify-deps
ci/prow/e2e-azure-operator	a0154e9	link	true	/test e2e-azure-operator
ci/prow/e2e-aws-ovn-techpreview	a0154e9	link	false	/test e2e-aws-ovn-techpreview
ci/prow/e2e-aws-ovn	a0154e9	link	true	/test e2e-aws-ovn
ci/prow/hypershift-e2e-aks	a0154e9	link	true	/test hypershift-e2e-aks
ci/prow/e2e-aws-ovn-serial	a0154e9	link	true	/test e2e-aws-ovn-serial
ci/prow/e2e-aws-ovn-single-node	a0154e9	link	false	/test e2e-aws-ovn-single-node
ci/prow/e2e-aws-ovn-serial-2of2	a0154e9	link	true	/test e2e-aws-ovn-serial-2of2

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[alebedev87]

We don't directly modify the vendored modules. There should be a corresponding go.mod/go.sum bump for this change.

[Miciah]

/assign

[candita]

/assign @rfredette @davidesalerno

[davidesalerno]

Even if we cannot change vendored modules as pointed out by Andrey, I think there is an error.

The annotation should be json:"curves,omitempty" (with comma)