[v2] E2E test for --target

[blampe]

Turns out we already plumb target from Stack → Update → Agent → Auto API:

pulumi-kubernetes-operator/operator/internal/controller/pulumi/stack_controller.go

Lines 1260 to 1261 in 2a67d4c

	Target: o.Spec.Targets,
	TargetDependents: ptr.To(o.Spec.TargetDependents),

pulumi-kubernetes-operator/operator/internal/controller/auto/update_controller.go

Lines 214 to 215 in 2a67d4c

	Target: obj.Spec.Target,
	TargetDependents: obj.Spec.TargetDependents,

pulumi-kubernetes-operator/agent/pkg/server/server.go

Lines 486 to 490 in 2a67d4c

	if in.Target != nil {
	opts = append(opts, optup.Target(in.Target))
	}
	if in.GetTargetDependents() {
	opts = append(opts, optup.TargetDependents())

This adds a small E2E test around the behavior.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 49.57%. Comparing base (2a67d4c) to head (163573b).
Report is 2 commits behind head on v2.

Additional details and impacted files

@@           Coverage Diff           @@
##               v2     #711   +/-   ##
=======================================
  Coverage   49.57%   49.57%           
=======================================
  Files          27       27           
  Lines        2911     2911           
=======================================
  Hits         1443     1443           
  Misses       1290     1290           
  Partials      178      178           

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