fix: add gofmt to golangci-lint in Makefile and .github/workflows/ci-build.yaml

[Calchan]

Out of curiosity I ran gofmt at the top of the repo and it found quite a few formatting issues and simplifications. This PR adds gofmt to golangci-lint in Makefile and .github/workflows/ci-build.yaml to automatically detect/fix these issues in the future. It also applies the relevant changes provided by running gofmt.

Checklist:

• Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this does not need to be in the release notes.
• The title of the PR states what changed and the related issues number (used for the release note).
• The title of the PR conforms to the Toolchain Guide
• I've included "Closes [ISSUE #]" or "Fixes [ISSUE #]" in the description to automatically close the associated issue.
• I've updated both the CLI and UI to expose my feature, or I plan to submit a second PR with them.
• Does this PR require documentation updates?
• I've updated documentation as required by this PR.
• Optional. My organization is added to USERS.md.
• I have signed off all my commits as required by DCO
• I have written unit and/or e2e tests for my change. PRs without these are unlikely to be merged.
• My build is green (troubleshooting builds).
• My new feature complies with the feature status guidelines.
• I have added a brief description of why this PR is necessary and/or what this PR solves.

[codecov]

Codecov Report

Patch coverage: 83.33% and no project coverage change.

Comparison is base (d7632df) 49.76% compared to head (124f80b) 49.76%.

❗ Current head 124f80b differs from pull request most recent head a0c02eb. Consider uploading reports for the commit a0c02eb to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #13729   +/-   ##
=======================================
  Coverage   49.76%   49.76%           
=======================================
  Files         261      261           
  Lines       44676    44676           
=======================================
  Hits        22232    22232           
  Misses      20257    20257           
  Partials     2187     2187           

Impacted Files	Coverage Δ
server/badge/badge.go	83.50% <ø> (ø)
server/logout/logout.go	79.16% <ø> (ø)
util/db/certificate.go	76.83% <ø> (ø)
util/db/helmrepository.go	0.00% <0.00%> (ø)
util/io/files/util.go	57.57% <ø> (ø)
util/settings/resources_filter.go	100.00% <ø> (ø)
applicationset/generators/list.go	61.11% <100.00%> (ø)
util/argo/argo.go	66.45% <100.00%> (ø)
util/db/repository_legacy.go	46.77% <100.00%> (ø)
util/helm/client.go	50.65% <100.00%> (ø)

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[blakepettersson]

LGTM 👍

[crenshaw-dev]

I'm gonna save this until after we cut 2.8-rc1. Wanna avoid anything that will reduce PR velocity until then.

[Calchan]

I'm gonna save this until after we cut 2.8-rc1. Wanna avoid anything that will reduce PR velocity until then.

No worries. Let me know when you do it and I'll rebase just before that.

[Calchan]

@crenshaw-dev I have manually rebased this in case you want to merge it since v2.8.0-rc1 has been released.