Fetch namespaces at time of sync

[briandealwis]

Fixes: #5968

Description
The podSyncer is initialized with the set of namespaces from the configuration, and thus misses any namespace updates from the deployment.

skaffold/pkg/skaffold/sync/provider.go

Lines 41 to 49 in 823896b

	func NewSyncProvider(config Config, cli *kubectl.CLI) Provider {
	once.Do(func() {
	provider = &fullProvider{
	kubernetesSyncer: func(podSelector *kubernetes.ImageList) Syncer {
	return &podSyncer{
	kubectl: cli,
	namespaces: config.GetNamespaces(),
	}
	},

This patch causes the config to be passed to the podSyncer such that it processes the known namespaces at sync time.

[gsquared94]

lgtm

[codecov]

Codecov Report

Merging #6135 (c52e3bc) into master (823896b) will decrease coverage by 0.01%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##           master    #6135      +/-   ##
==========================================
- Coverage   69.94%   69.93%   -0.02%     
==========================================
  Files         478      478              
  Lines       18286    18286              
==========================================
- Hits        12791    12789       -2     
- Misses       4548     4549       +1     
- Partials      947      948       +1     

Impacted Files	Coverage Δ
pkg/skaffold/sync/sync.go	70.27% <0.00%> (ø)
pkg/skaffold/sync/types.go	0.00% <ø> (ø)
pkg/skaffold/sync/provider.go	71.42% <100.00%> (ø)
pkg/skaffold/util/tar.go	50.66% <0.00%> (-5.34%)	⬇️
pkg/skaffold/docker/parse.go	87.14% <0.00%> (+0.95%)	⬆️

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