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_2/noop

@@ -1,9 +1,11 @@
 merged environment: &{default  map[] map[] map[]}
 2 release(s) found in helmfile.yaml
 
-processing 1 groups of releases in this order:
+processing 2 groups of releases in this order:
 GROUP RELEASES
 1     bar
+2     foo
 
-processing releases in group 1/1: bar
+processing releases in group 1/2: bar
+processing releases in group 2/2: foo
 No affected releases