Add raw deployment deployer

[creydr]

Changes

• 🎁 Adds the possibility to deploy the function as a raw kubernetes deployment instead of a knative service
  • Added some new package in pkg:
    • pkg/deployer: This has the two deployer options (as sub packages). That way it should be "easier" to add additional deployers (e.g. for wasm...) later
    • Similar to the deployer added also packages for the describer, remover and lister, which contains the implementations for the deploy-type (knative & k8s) as sub packages
  • Updated the existing integration tests for the deployer, describer, remover and lister and made them generic, so I could reuse them for the raw deployments too
  • Added a MultiDescriber, MultiRemover and MultiLister which are the defaults in the client setup now. Those check the existing source (service for the function.knative.dev/deploy-type annotation) and then delegate the action (Describe, Remove or List) to the according implementation.
  • Added the deploy-type as a new column in the list command

$ func deploy --registry localhost:50000 --deploy-type raw
Building function image
Still building
🙌 Function built: localhost:50000/go-http-func:latest
Pushing function image to the registry "localhost:50000" using the "" user credentials
🎯 Creating Triggers on the cluster
✅ Function deployed in namespace "default" and exposed at URL: 
   http://go-http-func.default.svc.cluster.local

$ func list                                                       
NAME          NAMESPACE  RUNTIME  DEPLOY-TYPE  URL                                             READY
go-http-func  default             raw          http://go-http-func.default.svc                 True
go-http-ksvc  default             knative      http://go-http-ksvc.default.127.0.0.1.sslip.io  True

$ func describe go-http-func                                      
Function name:
  go-http-func
Function is built in image:
  
Function is deployed in namespace:
  default
Routes:
  http://go-http-func.default.svc
Deploy-Type:
  raw
Labels:
  boson.dev/function: true
  function.knative.dev/name: go-http-func
  function.knative.dev/runtime: go

$ k get ksvc
NAME            URL                                               LATESTCREATED         LATESTREADY           READY   REASON
go-http-ksvc    http://go-http-ksvc.default.127.0.0.1.sslip.io    go-http-ksvc-00001    go-http-ksvc-00001    True    

$ k get ksvc go-http-func # <-- no Knative Service deployment for our function !
Error from server (NotFound): services.serving.knative.dev "go-http-func" not found

$ k get deploy
NAME                             READY   UP-TO-DATE   AVAILABLE   AGE
go-http-func                     1/1     1            1           47s

$  k get svc   
NAME                                    TYPE           CLUSTER-IP      EXTERNAL-IP                                         PORT(S)                                              AGE
go-http-func                            ClusterIP      10.96.173.129   <none>                                              80/TCP                                               62s
...

/kind enhancement

Fixes: #2804

Release Note

Add the possibility to deploy a function as raw kubernetes deployment via the --deploy-type=raw argument

[knative-prow]

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[codecov]

Codecov Report

❌ Patch coverage is 37.24854% with 967 lines in your changes missing coverage. Please review.
✅ Project coverage is 52.71%. Comparing base (7125924) to head (163b15e).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/deployer/integration_test_helper.go	0.00%	304 Missing ⚠️
pkg/deployer/common.go	26.70%	222 Missing and 14 partials ⚠️
pkg/deployer/knative/deployer.go	61.23%	86 Missing and 40 partials ⚠️
pkg/k8s/wait.go	0.00%	61 Missing ⚠️
pkg/deployer/k8s/deployer.go	70.98%	28 Missing and 19 partials ⚠️
pkg/lister/multi_lister.go	13.15%	33 Missing ⚠️
pkg/describer/k8s/describer.go	45.65%	17 Missing and 8 partials ⚠️
pkg/testing/k8s/testing.go	0.00%	20 Missing ⚠️
pkg/k8s/logs.go	69.35%	14 Missing and 5 partials ⚠️
pkg/remover/k8s/remover.go	43.47%	9 Missing and 4 partials ⚠️
... and 13 more

❗ There is a different number of reports uploaded between BASE (7125924) and HEAD (163b15e). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (7125924)	HEAD (163b15e)
e2e-tests	2	1

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3075      +/-   ##
==========================================
- Coverage   59.39%   52.71%   -6.69%     
==========================================
  Files         134      148      +14     
  Lines       13495    14809    +1314     
==========================================
- Hits         8016     7806     -210     
- Misses       4538     6030    +1492     
- Partials      941      973      +32     

Flag	Coverage Δ
e2e-tests	31.38% <27.68%> (-8.86%)	⬇️
integration-tests	49.45% <28.03%> (-3.56%)	⬇️
unit-tests	45.23% <3.73%> (-1.51%)	⬇️

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[creydr]

Rebased after #3100 was in

[creydr]

/cc @lkingland @gauron99 @matzew
Ready for review

[creydr]

Rebased to fix merge conflicts