feat(kuma-cp): mesh load balancing strategy implementation

[lukidzi]

Checklist prior to review

Implementation of https://github.com/kumahq/kuma/blob/master/docs/madr/decisions/031-locality-aware-load-balancing.md

This PR introduces functionality to load balance traffic within the zone and allows to define policy for routing cross-zone traffic. Implementation doesn't use a CLACache for endpoints because of the high chances that CLA groups won't be reused. That is going to be introduced in the future #8121

TODO:

• Configuration of egress for a zone not a specific client - separate PR
• Client specific routing with egress - [MeshLoadBalancingStrategy] Support egress configuration per client #8127

• Link to relevant issue as well as docs and UI issues -- fix: Implement Basic functionality of Locality Aware Load Balancing #8073
• This will not break child repos: it doesn't hardcode values (.e.g "kumahq" as a image registry) and it will work on Windows, system specific functions like syscall.Mkfifo have equivalent implementation on the other OS --
• Tests (Unit test, E2E tests, manual test on universal and k8s) --
  • Don't forget ci/ labels to run additional/fewer tests
• Do you need to update UPGRADE.md? --
• Does it need to be backported according to the backporting policy? (this GH action will add "backport" label based on these file globs, if you want to prevent it from adding the "backport" label use no-backport-autolabel label) --

Changelog: feat(MeshLoadBalancingStrategy): new locality aware api