Update linter config, in particular revive

About revive, the default settings are very lame

There is an enable-all equivalent, that should be activated

Here is a golangci-lint .golangci.yml I wrote a few months ago

You can have a look at the revive settings

https://github.com/theredditbandit/pman/blob/master/.golangci.yaml#L133-L219

_Originally posted by @ccoVeille in https://github.com/fortio/workflows/pull/55#discussion_r1673030244_