helm should return non-zero on invalid commands

[tobert]

helm should exit with a non-zero status if a command is invalid.

e.g. the valid helm 2 command helm search foo/bar prints the help text and returns 0 on helm3.

I would expect it to return 1 so scripts can fail and have that detected.

[mattfarina]

You are right. There is an existing issue for this bug at #8268. I'm going to close this as a duplicate.