feat: use problem matchers for GitHub Action format

[ldez]

Currently, when running the GitHub Action each annotation creates 2 outputs:

• a "popup"
• a log

The "popup" works well but the log doesn't display the file information (path, position).

The default annotations format ::error file={name},line={line},col={endLine}::{message} doesn't display the file information (I don't know why).

• https://docs.github.com/en/actions/using-workflows/workflow-commands-for-github-actions#setting-a-warning-message
• https://docs.github.com/en/actions/using-workflows/workflow-commands-for-github-actions#setting-an-error-message

This PR uses a specific feature called "Problem Matchers" that allows defining a custom format.
With this custom format, the log displays file information.

Fixes golangci/golangci-lint-action#119

[bombsimon]

💯