Make linter happy again

[jjngx]

Proposed changes

• Update Go v1.19
• Fix liner complains (change of Go std libraries)
• Remove not supported liner checks
• Run some tests in parallel

Test run:

➜  nginx-ns1-gslb git:(fix-library-dependency) make test
go test ./... -race -shuffle=on
?   	github.com/nginxinc/nginx-ns1-gslb/cmd/agent	[no test files]
?   	github.com/nginxinc/nginx-ns1-gslb/internal	[no test files]
ok  	github.com/nginxinc/nginx-ns1-gslb/internal/agent	0.740s
ok  	github.com/nginxinc/nginx-ns1-gslb/internal/input	0.392s
ok  	github.com/nginxinc/nginx-ns1-gslb/internal/output	0.559s

Linter:

➜  nginx-ns1-gslb git:(fix-library-dependency) make lint
docker run --pull always --rm -v /Users/j.jarosz/work/nginx-ns1-gslb:/nginx-ns1-gslb -w /nginx-ns1-gslb -v /Users/j.jarosz/Library/Caches/go-build:/cache/go -e GOCACHE=/cache/go -e GOLANGCI_LINT_CACHE=/cache/go -v /Users/j.jarosz/go/pkg:/go/pkg golangci/golangci-lint:latest golangci-lint --color always run
latest: Pulling from golangci/golangci-lint
Digest: sha256:af723bd6fb13b3cf2dc6e39b5fbc9a6bd0ada2c6f92ce3590eeb0ce71d9174d4
Status: Image is up to date for golangci/golangci-lint:latest

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork