ci(*): update helm-chart-smoketest.yml, add wasmtime-v1 coverage

[vdice]

Describe your changes

• Updates the helm chart smoke test to support more than the spin shim
• Add coverage for the wasmtime-v1 shim/app

Notes:

• This effort has (re-)churned up issue(s) with the k3d distro (before, we would skip a few checks that glossed over the behavior); for now, in this PR, I've just included a generous timeout, but a follow-up is needed to determine why it can sometimes take many failed shim install pods before the shim is ready. (For instance, the other distros usually finish in ~1.5-3 minutes, whereas the k3d variant can be in that range but can also, mysteriously, take much longer)
  • I'm cautiously optimistic that shim-downloder: retry logic #591 may help
• I realize this shell-based approach is probably nearing the limits of maintainability/readability. Happy to brainstorm follow-up(s) on how to improve or migrate to a different test harness. (Could be as simple as moving inline bash into scripts to improve the workflow 'flow' itself)

Issue ticket number and link

Depends on #604 (Can rebase after that lands)

Closes #602

[vdice]

@kate-goldenring this should be ready for a re-review. I am still seeing instability with the k3d flavor of the smoketest (passing sometimes, timing out other times); if it continues to plague us, we can deactivate it while digging deeper. I did disable setting the containerdRuntimeOptions for this distro, but it doesn't seem to help this particular behavior. edit: #618 should fix k3d instability

Note that this PR does rely on the following fix (specifically for the wasmtime shim): #604

[kate-goldenring]

@vdice can this pr be based on the branch of #604 to scope the commits? Then once that merges, this will automatically be based on main by GitHub.

[kate-goldenring]

Just a few cleanup notes to improve maintainability.