Implement DetermineStrategy with SDK

[ffjlabo]

What this PR does:

I implemented k8s DetermineStrategy by using SDK.

Why we need it:

We want to implement plugins with SDK.

Which issue(s) this PR fixes:

Part of #4980 #5006

Does this PR introduce a user-facing change?:

• How are users affected by this change:
• Is this breaking change:
• How to migrate (if breaking change):

[ffjlabo]

reference implementation:

pipecd/pkg/app/pipedv1/plugin/kubernetes/deployment/server.go

Lines 82 to 107 in 7b4c9bd

	func (a *DeploymentService) DetermineStrategy(ctx context.Context, request *deployment.DetermineStrategyRequest) (*deployment.DetermineStrategyResponse, error) {
	cfg, err := config.DecodeYAML[*kubeconfig.KubernetesApplicationSpec](request.GetInput().GetTargetDeploymentSource().GetApplicationConfig())
	if err != nil {
	return nil, status.Error(codes.InvalidArgument, err.Error())
	}
	runnings, err := a.loadManifests(ctx, request.GetInput().GetDeployment(), cfg.Spec, request.GetInput().GetRunningDeploymentSource())
	if err != nil {
	return nil, status.Error(codes.Internal, err.Error())
	}
	targets, err := a.loadManifests(ctx, request.GetInput().GetDeployment(), cfg.Spec, request.GetInput().GetTargetDeploymentSource())
	if err != nil {
	return nil, status.Error(codes.Internal, err.Error())
	}
	strategy, summary := determineStrategy(runnings, targets, cfg.Spec.Workloads, a.logger)
	return &deployment.DetermineStrategyResponse{
	SyncStrategy: strategy,
	Summary: summary,
	}, nil
	}

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 37 lines in your changes missing coverage. Please review.

Project coverage is 25.56%. Comparing base (5ce218d) to head (297642b).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
...app/pipedv1/plugin/kubernetes/deployment/plugin.go	0.00%	27 Missing ⚠️
.../pipedv1/plugin/kubernetes/deployment/determine.go	0.00%	10 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5671      +/-   ##
==========================================
- Coverage   25.57%   25.56%   -0.02%     
==========================================
  Files         478      478              
  Lines       51240    51277      +37     
==========================================
+ Hits        13105    13107       +2     
- Misses      37130    37165      +35     
  Partials     1005     1005              

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[Warashi]

Let's try!
After merging this, let's refactor determineStrategy with no use of types from the model package.