Improve golangci-lint usage

[joestringer]

• .github: Add line output to golangci-lint
• .github: Verbosely print golangci-lint output
• .github: Use tree /vendor for golangci-lint

Related: #25155

[joestringer]

OK, with 57b4a95 it seems to generate much more usable output now:

Running [/home/runner/golangci-lint-1.52.2-linux-amd64/golangci-lint run --out-format=github-actions --out-${NO_FUTURE}format colored-line-number --verbose] in [] ...
  Error: daemon/cmd/daemon.go:286:6: func `unusedFunction` is unused (unused)
  func unusedFunction() {
       ^
  
  level=info msg="[config_reader] Config search paths: [./ /home/runner/work/cilium/cilium /home/runner/work/cilium /home/runner/work /home/runner /home /]"
  level=info msg="[config_reader] Used config file .golangci.yaml"
  level=info msg="[lintersdb] Active 10 linters: [goerr113 gofmt goheader goimports gosec govet ineffassign misspell staticcheck unused]"
  level=info msg="[loader] Go packages loading at mode 575 (deps|name|types_sizes|compiled_files|exports_file|files|imports) took 5m36.265047123s"
  level=info msg="[runner/filename_unadjuster] Pre-built 0 adjustments in 549.86584ms"
  level=info msg="[linters_context/goanalysis] analyzers took 20m[19](https://github.com/cilium/cilium/actions/runs/4814957952/jobs/8573182801?pr=25157#step:4:21).0186168s with top 10 stages: buildir: 9m4.903047954s, buildssa: 3m49.413886833s, goheader: 3m2.576389326s, goimports: 58.287376638s, nilness: 19.379284378s, gofmt: 17.172725288s, unused: 12.043143062s, gosec: 11.106144502s, misspell: 10.043033797s, inspect: 9.292417646s"
  level=info msg="[runner] Issues before processing: 3396, after processing: 1"
  level=info msg="[runner] Processors filtering stat (out/in): path_prefixer: 1/1, sort_results: 1/1, identifier_marker: 1924/1924, max_same_issues: 1/1, source_code: 1/1, severity-rules: 1/1, max_from_linter: 1/1, skip_files: 3364/3364, skip_dirs: 3364/3364, nolint: 1/5, uniq_by_line: 1/1, exclude-rules: 5/1924, max_per_file_from_linter: 1/1, fixer: 1/1, cgo: 3364/3396, filename_unadjuster: 3364/3364, path_prettifier: 3364/3364, autogenerated_exclude: 1924/3364, exclude: 1924/1924, diff: 1/1, path_shortener: 1/1"
  level=info msg="[runner] processing took 338.08251ms with stages: autogenerated_exclude: 217.856269ms, identifier_marker: 49.009213ms, exclude-rules: 32.223477ms, path_prettifier: 31.398181ms, skip_dirs: 3.769085ms, nolint: 3.209588ms, cgo: 285.499µs, filename_unadjuster: 210.099µs, source_code: 108.099µs, uniq_by_line: 4.4µs, max_same_issues: 2.4µs, max_from_linter: 1.1µs, path_shortener: 1.1µs, skip_files: 1µs, exclude: 900ns, fixer: 500ns, max_per_file_from_linter: 500ns, diff: 300ns, sort_results: 300ns, severity-rules: 300ns, path_prefixer: 200ns"
  level=info msg="[runner] linters took 3m9.50643171s with stages: goanalysis_metalinter: 3m9.1681977s"
  level=info msg="File cache stats: 2630 entries of total size 15.9MiB"
  level=info msg="Memory: 4573 samples, avg is 796.8MB, max is 4704.7MB"
  level=info msg="Execution took 8m46.333588747s"
  
  Error: issues found
  Ran golangci-lint in 5[26](https://github.com/cilium/cilium/actions/runs/4814957952/jobs/8573182801?pr=25157#step:4:28)681ms