Update dependency architect to v5.6.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
architect (source)	orb	minor	5.5.1 -> 5.6.0

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Release Notes

giantswarm/architect-orb (architect)

### [`v5.6.0`](https://togithub.com/giantswarm/architect-orb/blob/HEAD/CHANGELOG.md#560---2024-08-26) [Compare Source](https://togithub.com/giantswarm/architect-orb/compare/v5.5.2...v5.6.0) ##### Changed - Bump architect to v6.18.0, which uses Go v1.23.0 ### [`v5.5.2`](https://togithub.com/giantswarm/architect-orb/blob/HEAD/CHANGELOG.md#552---2024-08-26) [Compare Source](https://togithub.com/giantswarm/architect-orb/compare/v5.5.1...v5.5.2) ##### Removed - In command `go-test`... - remove the step that executes `go vet`, as the same checks are also run by `golangci-lint` - move the `go test` step up to get executed before `golangci-lint`, for reduced runtime. - Add cache for `golangci-lint` ##### Changed - In command `go-test`, the `golangci-lint` call is no longer limited to a certain number of issues per linter (max-issues-per-linter is now 0). - In command `go-test`, use the `environment` key for setting environment variables.

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