Extend `genSignedCert` function parameter `ips` type

[YuryHrytsuk]

How to reproduce

The code below produces the error ... at <$ips>: wrong type for value; expected []interface {}; got []string

{{- $ips := splitList "," "1.1.1.1,2.2.2.2" -}}
{{- $genCert := genSignedCert .cn $ips nil 3650 .ca }}

Question/suggestion

Probably, the type []string should be acceptable ? Reasons:

• it seems to be correct logically
• it is useful when dealing with raw user input.

Workaround

Adding compact function does the trick

{{- $ips := splitList "," "1.1.1.1,2.2.2.2" | compact -}}
{{- $genCert := genSignedCert .cn $ips nil 3650 .ca }}

Environment info

Output of helm version:

version.BuildInfo{Version:"v3.4.1", GitCommit:"c4e74854886b2efe3321e185578e6db9be0a6e29", GitTreeState:"dirty", GoVersion:"go1.15.4"}