(chore): Add linter improvements

[camilamacedo86]

Description

This PR improves our linting process by:

• Update Makefile to improve lint target and add the lint-fix which can fix small issues like format and to sort the imports
• Add linter check using github action, removing the need to check logs. Example:

##Motivation

• Make it easier to fix lint issues and do the review
• Move checks to GitHub actions
• Ensuring consistent linting behaviour
• Remove the need to set up lint manually. See that when we run make lint if the bin does not exist the target will download it, see;

$ make check                         
make lint
/Users/camilamacedo/go/src/github.com/foundriesio/fioctl/bin/golangci-lint run

• Allow leverage in the common checks to avoid errors; see proposed follow-up:

[StealthyCoder]

@doanac I will leave it to you if you want to move these checks to Github Actions rather than our GavelCI 👍

[vkhoroz]

It think this is the correct direction, and @doanac would probably agree.

But, please, make this in the least intrusive way.

[vkhoroz]

@camilamacedo86 this is also conflicting with my PR #269.
So, I'd like your changes to be as minimal and the review go as smoothly as possible.

[camilamacedo86]

Hi @vkhoroz,

I addressed all suggestions as much as possible.
Regards:

@camilamacedo86 this is also conflicting with my PR #269.
So, I'd like your changes to be as minimal and the review go as smoothly as possible.

Could you please let me know where is the conflict?
The changes in the Makefile are not on the same lines so it seems that will be fine.
Please, let me know if I missed something.

[vkhoroz]

LGTM