Allow building golangci-lint from source

[SuperSandro2000]

To solve issues like #442 (comment) it would be cool if instead of downloading the precompiled binary you could either set a flag that golangci-lint is build from source or the user needs to download and install it in a previous step and the action just expects it to be in $PATH.

[shahzadlone]

Sounds like a good idea! I found this is what was causing our builds to fail as we are on 1.18 and the precompiled 1.48 golangci-lint would keep using 1.19 golang rules, when the one built from source was working fine.

[ldez]

Close in favor of #540