GEP 3779 - East/West Identity-Based Authorization

[LiorLieberman]

/kind gep

First iteration of provisional GEP - focused on "What?"/"Why?"/"Who?"

What this PR does / why we need it:
To support e/w authorization with Gateway For Mesh APIs

Which issue(s) this PR fixes:

Fixes #3779

Does this PR introduce a user-facing change?:

NONE

[k8s-ci-robot]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: LiorLieberman
Once this PR has been reviewed and has the lgtm label, please assign mlavacca for approval. For more information see the Code Review Process.

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

Needs approval from an approver in each of these files:

• geps/OWNERS

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

[howardjohn]

there is another draft gep for the same thing, is it feasible for you 2 to work together on a single proposal

[LiorLieberman]

there is another draft gep for the same thing, is it feasible for you 2 to work together on a single proposal

We are, on this PR. opened another one just technical reasons asked aryan to close the other PR

[LiorLieberman]

/cc @robscott as well

[k8s-ci-robot]

@LiorLieberman: GitHub didn't allow me to request PR reviews from the following users: as, well.

Note that only kubernetes-sigs members and repo collaborators can review this PR, and authors cannot review their own PRs.

In response to this:

/cc @robscott as well

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-sigs/prow repository.