Update GitHub Actions workflows to use setup-go@v5 and golangci-lint-action@v6; refactor error formatting and import statements

[devhindo]

fixes issues with existing code

edit: solves: #151

[devhindo]

all tests are passing now except for this issue! meshery/meshery#13024 @leecalcote

[devhindo]

an opinion about the mentioned issue would be really helpful

[theBeginner86]

Looks good, thanks!

[theBeginner86]

This PR also fixes this ancient GH issue: #151 👏🙌

[theBeginner86]

an opinion about the mentioned issue would be really helpful

In my opinion, all E2E workflow are failing because the pattern file that is being used to deploy the mesh is of former OAM type and doesn't follows the new MeshModel schema due to which Meshery server is unable to ingest the sample design (a step done before passing it on to the Service Mesh Adapter for deployment) and hence the subsequent assertions that are made in workflow fails.

This error message confirms that pattern apply failed https://github.com/meshery/meshery-cilium/actions/runs/12528133889/job/34942427822?pr=173#step:17:14

Also, the status of all resources in K8s here https://github.com/meshery/meshery-cilium/actions/runs/12528133889/job/34942427822#step:22:1 confirms that the service mesh didn't come up.

If we can update these pattern files https://github.com/meshery/meshery-cilium/blob/master/.github/install/deploy.yaml based on the Meshery Design schema then we should be able to fix the issue.

[leecalcote]

Good!