Oauth server: Route external traffic through guest cluster

[alvaroaleman]

This change makes the oauth server route external traffic through the
guest cluster, in order to enable communication with IDPs that are only
accessible from the guest cluster network.

https://issues.redhat.com/browse/HOSTEDCP-421

What this PR does / why we need it:

Which issue(s) this PR fixes (optional, use fixes #<issue_number>(, fixes #<issue_number>, ...) format, where issue_number might be a GitHub issue, or a Jira story:
Fixes #

Checklist

• Subject and description added to both, commit and PR.
• Relevant issues have been referenced.
• This change includes docs.
• This change includes unit tests.

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: alvaroaleman

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [alvaroaleman]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[enxebre]

can we please add it to the list explaining why here https://github.com/openshift/enhancements/blob/master/enhancements/hypershift/networking/networking.md#konnectivity-socks5-proxy

[enxebre]

/lgtm
/retest

[openshift-ci-robot]

/retest-required

Remaining retests: 2 against base HEAD 82d3c60 and 8 for PR HEAD 8372ffd in total

[alvaroaleman]

/hold
#1526 needs to merge first

[alvaroaleman]

/hold cancel
/retest-required

[openshift-ci]

@alvaroaleman: 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/capi-provider-agent-sanity	8372ffd	link	false	/test capi-provider-agent-sanity
ci/prow/e2e-aws-nested	8372ffd	link	false	/test e2e-aws-nested

Full PR test history. Your PR dashboard.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository. I understand the commands that are listed here.

[relyt0925]

There's exceptions to this rule needed in hypershift (the login functionaility for 4.11 is currently broken). @hasueki is going to add a pr short term for no proxy for iam.cloud.ibm.com,iam.test.cloud.ibm.com

It will be important to have for our next Satellite 4.11 release.

[alvaroaleman]

a pr short term for no proxy for iam.cloud.ibm.com,iam.test.cloud.ibm.com

SGTM, but lets gate this to IBM cloud clusters