fix: helmDefaults.skipRefresh ignored in runHelmDepBuilds (#2415)

fix: helmDefaults.skipRefresh ignored in runHelmDepBuilds (#2269)

`runHelmDepBuilds()` only checked the CLI flag (`opts.SkipRefresh`) when
deciding whether to run `helm repo update` before building dependencies.
This meant that setting `helmDefaults.skipRefresh: true` in helmfile.yaml
had no effect on the repo update call inside dep builds.

Add `!st.HelmDefaults.SkipRefresh` to the guard condition so that
`helmDefaults.skipRefresh: true` is respected alongside the CLI flag.

Signed-off-by: Aditya Menon <amenon@canarytechnologies.com>

test/integration/test-cases/issue-2269/input/chart/Chart.yaml

@@ -0,0 +1,4 @@
+apiVersion: v2
+name: test-chart-2269
+version: 0.1.0
+description: Minimal chart for issue #2269 integration test

test/integration/test-cases/issue-2269/input/chart/templates/configmap.yaml

@@ -0,0 +1,6 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: test-2269
+data:
+  key: value

test/integration/test-cases/issue-2269/input/helmfile.yaml

@@ -0,0 +1,13 @@
+# Issue #2269: helmDefaults.skipDeps and helmDefaults.skipRefresh should prevent
+# repo operations (Adding repo, helm repo update) without needing CLI flags.
+repositories:
+- name: fake-repo
+  url: https://fake-repo.example.com
+
+helmDefaults:
+  skipDeps: true
+  skipRefresh: true
+
+releases:
+- name: test-release-2269
+  chart: ./chart