Add translation for GKE Security Policy

[sawsa307]

What type of PR is this?
/kind feature

What this PR does / why we need it:
Adding a new feature for GKE Ingress and Gateway conversion.

Which issue(s) this PR fixes:
Adding more feature for #87.

Does this PR introduce a user-facing change?:

Ingress2gateway now supports translating Cloud Armor security policy on GKE Ingress to GCPBackendPolicy on GKE Gateway.

[sawsa307]

/assign @robscott
/assign @LiorLieberman

[spencerhance]

/assign @spencerhance

[spencerhance]

Can we move all the sessionaffinity changes into a separate PR?

[sawsa307]

Can we move all the sessionaffinity changes into a separate PR?

All changes related to session affinity are refactors, are you suggesting put refactor into its own PR and the new feature security policy in another? @spencerhance

[spencerhance]

Can we move all the sessionaffinity changes into a separate PR?

All changes related to session affinity are refactors, are you suggesting put refactor into its own PR and the new feature security policy in another? Spencer Hance

Yes that would be great. I know this PR isn't huge but generally decoupling refactors from new feature implementations helps reviewers (and git blame). My recommendation would be a PR to refactor SessionAffinity and then a PR for SecurityPolicy implementation.

[spencerhance]

@sawsa307 Can you ping me after you rebase and i'll take another look?

[sawsa307]

I just did the rebase, please let me know if there is any other question, thanks! @spencerhance

[spencerhance]

/lgtm
/approve

Thanks!

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: LiorLieberman, sawsa307, spencerhance

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