ci(workflows): update helm version to v3.18.4 and add matrix for tests (#207)

.github/workflows/unit-tests.yml

@@ -11,7 +11,17 @@ on: # rebuild any PRs and main branch changes
 
 jobs:
    build: # make sure build/ci works properly
-      runs-on: ubuntu-latest
+      strategy:
+         matrix:
+            os:
+               - ubuntu-latest
+               - ubuntu-24.04-arm
+               - windows-latest
+               - windows-11-arm
+               - macos-latest # arm
+               - macos-13 # x64
+         fail-fast: false
+      runs-on: ${{ matrix.os }}
       steps:
          - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2