feat: add --force-conflicts flag support for Helm 4 (#2480)

* feat: add --force-conflicts flag support for Helm 4

Add support for Helm 4's --force-conflicts flag which forces server-side
apply changes against conflicts. This flag is mutually exclusive with
--force/--force-replace and only available in Helm 4.

Fixes #2429

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

* fix: address review comments on force-conflicts feature

- Fix comment grammar: 'forces' instead of 'force'
- Improve error messages to indicate both sources (releases[] and helmDefaults)
- Add test case for helmDefaults.forceConflicts with Helm 3 (should error)
- Update TestGenerateID expected hashes after adding ForceConflicts field to structs

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

---------

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

pkg/state/temp_test.go

@@ -38,39 +38,39 @@ func TestGenerateID(t *testing.T) {
 	run(testcase{
 		subject: "baseline",
 		release: ReleaseSpec{Name: "foo", Chart: "incubator/raw"},
-		want:    "foo-values-6d799cf798",
+		want:    "foo-values-5bc9c89c6b",
 	})
 
 	run(testcase{
 		subject: "different bytes content",
 		release: ReleaseSpec{Name: "foo", Chart: "incubator/raw"},
 		data:    []byte(`{"k":"v"}`),
-		want:    "foo-values-7f885447bf",
+		want:    "foo-values-7bf9c8bcdf",
 	})
 
 	run(testcase{
 		subject: "different map content",
 		release: ReleaseSpec{Name: "foo", Chart: "incubator/raw"},
 		data:    map[string]any{"k": "v"},
-		want:    "foo-values-86f5d8fb55",
+		want:    "foo-values-65694d8947",
 	})
 
 	run(testcase{
 		subject: "different chart",
 		release: ReleaseSpec{Name: "foo", Chart: "stable/envoy"},
-		want:    "foo-values-5cd5c65db5",
+		want:    "foo-values-856c5f7dd5",
 	})
 
 	run(testcase{
 		subject: "different name",
 		release: ReleaseSpec{Name: "bar", Chart: "incubator/raw"},
-		want:    "bar-values-c59b4f979",
+		want:    "bar-values-fff55fbf5",
 	})
 
 	run(testcase{
 		subject: "specific ns",
 		release: ReleaseSpec{Name: "foo", Chart: "incubator/raw", Namespace: "myns"},
-		want:    "myns-foo-values-56d6cd88cc",
+		want:    "myns-foo-values-6bfbb74765",
 	})
 
 	for id, n := range ids {