Update golangci-lint version

[rajathagasthya]

Is your feature request related to a problem? Please describe.

We should update golangci-lint to the latest version v1.52.2.

In addition, we should also remove the following linters as they are deprecated:

deadcode
structcheck
varcheck

Describe the solution you'd like

A new version of golangci-lint to be run during linting.

Describe alternatives you've considered

Keep the old version and miss out on improvements.

Additional context

[yharish991]

thanks @rajathagasthya for opening this issue, i created an issue to revisit the linter rules #43 a while back, but didn't have enough bandwidth to get back to that issue. However, i think we need to remove the deprecated linters and update the golangci-lint to the latest version.

[rajathagasthya]

Good idea to do this and #43 together.