feat: flush remote values files cache

[kamsz]

Right now to force redownload of cached remote values files you've to manually remove it using rm -rf .helmfile. I'd suggest adding e.g. --update-remote argument to force redownload.

Originated from #469.

[kamsz]

cc @mumoshu

[mumoshu]

@kamsz Thanks for writing this up!

I see your expectation. Mind if I changed it to --invalidate-cache for now so that it is clear that it just clears .helmfile/cache?

--update-remote seemed best at glance, but turned out too fancy as if it checks for updates and download changed remotes only(which isn't true

[kamsz]

@mumoshu Sure thing!

[mumoshu]

Okay. Thanks for confirming!

[pelegbar1]

Huge bump here but was this ever fixed? to this day still removing the .cache/helmfile/values folder when using remote charts.