Gin improvements + zerolog

[ronenh]

• Split gorillaz and httpz into separate middleware.
• Improvements to Gin middleware:
  • Add Check implementation for authorizing using policy-rebac.
  • Add support for reading identities from gin.Context values instead of the context.Context of the underlying http.Request.
• Add logging in all middleware (using zerolog.Ctx logger)

[gertd]

We should update makefile lint to something like:

go work edit -json | jq -r '.Use[].DiskPath'  | xargs -I{} .ext/bin/golangci-lint run {}/... -c .golangci.yaml

similar for test

go work edit -json | jq -r '.Use[].DiskPath'  | xargs -I{} .ext/bin/gotestsum --format short-verbose -- -count=1 -v {}/...