refactor: enable ineffassign linter (#2500)

This change enables the ineffassign linter and fixes the only complaint
by refactoring the select state filter.

Part of #2503
Depends on #2499

- [x] Test, docs, adr added or updated as needed
- [x] [Contributor Guide
Steps](https://github.com/defenseunicorns/zarf/blob/main/.github/CONTRIBUTING.md#developer-workflow)
followed

src/pkg/cluster/state.go

@@ -267,6 +267,7 @@ func MergeZarfState(oldState *types.ZarfState, initOptions types.ZarfInitOptions
 		// TODO: Replace use of reflections with explicit setting
 		newState.RegistryInfo = helpers.MergeNonZero(newState.RegistryInfo, initOptions.RegistryInfo)
 		// Set the state of the internal registry if it has changed
+		// TODO: Internal registry should be a function of the address and not a property.
 		if newState.RegistryInfo.Address == fmt.Sprintf("%s:%d", helpers.IPV4Localhost, newState.RegistryInfo.NodePort) {
 			newState.RegistryInfo.InternalRegistry = true
 		} else {
@@ -290,6 +291,7 @@ func MergeZarfState(oldState *types.ZarfState, initOptions types.ZarfInitOptions
 		newState.GitServer = helpers.MergeNonZero(newState.GitServer, initOptions.GitServer)
 
 		// Set the state of the internal git server if it has changed
+		// TODO: Internal server should be a function of the address and not a property.
 		if newState.GitServer.Address == types.ZarfInClusterGitServiceURL {
 			newState.GitServer.InternalServer = true
 		} else {
@@ -313,6 +315,7 @@ func MergeZarfState(oldState *types.ZarfState, initOptions types.ZarfInitOptions
 		newState.ArtifactServer = helpers.MergeNonZero(newState.ArtifactServer, initOptions.ArtifactServer)
 
 		// Set the state of the internal artifact server if it has changed
+		// TODO: Internal server should be a function of the address and not a property.
 		if newState.ArtifactServer.Address == types.ZarfInClusterArtifactServiceURL {
 			newState.ArtifactServer.InternalServer = true
 		} else {

src/pkg/cluster/state_test.go

@@ -241,7 +241,7 @@ func TestMergeZarfStateArtifact(t *testing.T) {
 			oldArtifactServer: types.ArtifactServerInfo{
 				PushToken:      "foobar",
 				Address:        types.ZarfInClusterArtifactServiceURL,
-				InternalServer: false,
+				InternalServer: true,
 			},
 			expectedArtifactServer: types.ArtifactServerInfo{
 				PushToken:      "foobar",