test: add missing resp.Body.Close()

[alexandear]

The PR adds missing response body closing and enables bodyclose linter.

The code

defer func(body io.ReadCloser) {
	_ = body.Close()
}(resp.Body)

is simplified to

defer func() {
	_ = resp.Body.Close()
}()

to workaround bodyclose false positive:

internal/webui/net.go:51:23: response body must be closed (bodyclose)
        resp, err := http.Get(BaseURL)
                             ^

[codecov]

Bundle Report

Bundle size has no change ✅

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #260      +/-   ##
==========================================
- Coverage   91.77%   91.75%   -0.03%     
==========================================
  Files          86       86              
  Lines        4793     4793              
  Branches      241      241              
==========================================
- Hits         4399     4398       -1     
- Misses        313      314       +1     
  Partials       81       81              

Flag	Coverage Δ
integration	65.91% <ø> (-0.03%)	⬇️
ui	91.06% <ø> (ø)
unit	40.69% <100.00%> (+0.17%)	⬆️

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[Zxilly]

LGTM, thanks