feat: add sort-order option

[ldez]

Allows to change the sort order of the results.

This PR allows sorting by linter name, severity, and file information (file path, line, and column).

I still don't really understand the need behind this, but I found a "generic" way to do it, so I did it 🤷

By "generic" I mean an option not specific (like --sort-results-by-linter) and which can evolve without breaking changes (we can add more order types).

Demo

No sorting:

$ go run ./cmd/golangci-lint run --out-format=tab               
pkg/lint/linter/linter.go:44:19      revive          unused-parameter: parameter 'ctx' seems to be unused, consider removing or renaming it as _
pkg/config/output.go:61:1            gochecknoinits  don't use `init` function
pkg/config/output.go:62:2            gosimple        S1039: unnecessary use of fmt.Sprintf
pkg/result/processors/fixer.go:21:1  gochecknoinits  don't use `init` function
pkg/result/processors/fixer.go:22:2  gosimple        S1039: unnecessary use of fmt.Sprintf
exit status 1

Sort only based on file (default):

$ go run ./cmd/golangci-lint run --out-format=tab --sort-results   
pkg/config/output.go:61:1            gochecknoinits  don't use `init` function
pkg/config/output.go:62:2            gosimple        S1039: unnecessary use of fmt.Sprintf
pkg/lint/linter/linter.go:44:19      revive          unused-parameter: parameter 'ctx' seems to be unused, consider removing or renaming it as _
pkg/result/processors/fixer.go:21:1  gochecknoinits  don't use `init` function
pkg/result/processors/fixer.go:22:2  gosimple        S1039: unnecessary use of fmt.Sprintf
exit status 1

Sort only based on linter name:

$ go run ./cmd/golangci-lint run --out-format=tab --sort-order=linter --sort-results
pkg/config/output.go:61:1            gochecknoinits  don't use `init` function
pkg/result/processors/fixer.go:21:1  gochecknoinits  don't use `init` function
pkg/config/output.go:62:2            gosimple        S1039: unnecessary use of fmt.Sprintf
pkg/result/processors/fixer.go:22:2  gosimple        S1039: unnecessary use of fmt.Sprintf
pkg/lint/linter/linter.go:44:19      revive          unused-parameter: parameter 'ctx' seems to be unused, consider removing or renaming it as _
exit status 1

Fixes #4197

[bombsimon]

LGTM

[Antonboom]

🫡

[dackroyd]

I still don't really understand the need behind this, but I found a "generic" way to do it, so I did it 🤷

Thank you for adding this 🙏 Being able to sort by more than just file is helpful when uniq-by-file: false has been set (to ensure all issues are reported). I suspect that its of value even without that, as the same issue would be reported for each run, rather than it changing between runs when there are multiple on the same line.

With a stable sort order, its easier to assess changes to reported issues between versions, configuration changes etc by performing a simple diff between reports. Without this, a significant number of issues are out of order between reports, making for a lot of noise in assessing the change.

[ldez]

I'm happy if you are happy about this feature ❤️