fix: include-needs should only include direct dependencies, not transitive

- Fix collectDirectNeedsOnly to correctly match needs by full ID
- Fix PlanReleases to respect SelectedReleases when provided
- Fix unmarkNeedsDirectOnly to use full release IDs
- Update tests to expect correct behavior for include-needs vs include-transitive-needs
- Add SkipNeeds flag when needs are pre-included in withNeeds

This fixes CI issues in PR #2485

Signed-off-by: yxxhero <aiopsclub@163.com>

pkg/app/testdata/app_diff_test/include-needs

@@ -2,14 +2,12 @@ merged environment: &{default  map[] map[] map[]}
 WARNING: release test2 needs disabled, but disabled is not installed due to installed: false. Either mark disabled as installed or remove disabled from test2's needs
 2 release(s) matching app=test found in helmfile.yaml
 
-processing 4 groups of releases in this order:
+processing 3 groups of releases in this order:
 GROUP RELEASES
-1     default/kube-system/logging
-2     default/kube-system/kubernetes-external-secrets
-3     default/default/external-secrets
-4     default/default/my-release
+1     default/kube-system/kubernetes-external-secrets
+2     default/default/external-secrets
+3     default/default/my-release
 
-processing releases in group 1/4: default/kube-system/logging
-processing releases in group 2/4: default/kube-system/kubernetes-external-secrets
-processing releases in group 3/4: default/default/external-secrets
-processing releases in group 4/4: default/default/my-release
+processing releases in group 1/3: default/kube-system/kubernetes-external-secrets
+processing releases in group 2/3: default/default/external-secrets
+processing releases in group 3/3: default/default/my-release