chore: Update golangci-linter config and clean repo

[kaymckay]

This PR adds the new golangci linter configuration and cleans the repo. Since there was a lot, I cleaned a1-2 linters per commit for better visibility of the changes.

some things to note:

• noctx yelled at not having contexts with requests, so context.background() was added
• middleware/token.go uses a deprecated StandardClaims which is currently linted as a false positive, but we may want to upgrade to RegisterClaims -> causes some typing issues
  • will make an issue for this
• removed changelog code

[codecov]

Codecov Report

Merging #605 (e8cd089) into master (01cf76c) will increase coverage by 0.05%.
The diff coverage is 26.47%.

@@            Coverage Diff             @@
##           master     #605      +/-   ##
==========================================
+ Coverage   54.35%   54.40%   +0.05%     
==========================================
  Files         181      181              
  Lines       15169    15180      +11     
==========================================
+ Hits         8245     8259      +14     
+ Misses       6607     6604       -3     
  Partials      317      317              

Impacted Files	Coverage Δ
api/authenticate.go	0.00% <ø> (ø)
api/build.go	1.85% <0.00%> (+0.02%)	⬆️
api/deployment.go	0.00% <0.00%> (ø)
api/hook.go	0.00% <ø> (ø)
api/log.go	0.00% <0.00%> (ø)
api/metrics.go	0.00% <0.00%> (ø)
api/pagination.go	0.00% <ø> (ø)
api/pipeline.go	0.00% <0.00%> (ø)
api/repo.go	0.00% <ø> (ø)
api/scm.go	0.00% <0.00%> (ø)
... and 71 more

[KellyMerrick]

lgtm

[wass3r]

some minor comments - let me know what you think. thanks for all the work!

[KellyMerrick]

lgtm