chore: add support for usestdlibvars (#2708)

Author: remyleone

.golangci.yml

@@ -66,6 +66,7 @@ linters:
     - tparallel # tparallel detects inappropriate usage of t.Parallel() method in your Go test codes [fast: false, auto-fix: false]
     - typecheck # Like the front-end of a Go compiler, parses and type-checks Go code [fast: false, auto-fix: false]
     - unconvert # Remove unnecessary type conversions [fast: false, auto-fix: false]
+    - usestdlibvars # A linter that detect the possibility to use variables/constants from the Go standard library. [fast: true, auto-fix: false]
     - wastedassign # wastedassign finds wasted assignment statements. [fast: false, auto-fix: false]
     - whitespace # Tool for detection of leading and trailing whitespace [fast: true, auto-fix: true]
     - zerologlint # Detects the wrong usage of `zerolog` that a user forgets to dispatch with `Send` or `Msg` [fast: false, auto-fix: false]

internal/services/iot/helpers_iot.go

@@ -75,7 +75,7 @@ func computeIotHubMQTTCa(ctx context.Context, mqttCaURL string, m interface{}) (
 		return "", nil
 	}
 	var mqttCa *http.Response
-	req, _ := http.NewRequestWithContext(ctx, "GET", mqttCaURL, nil)
+	req, _ := http.NewRequestWithContext(ctx, http.MethodGet, mqttCaURL, nil)
 	mqttCa, err := meta.ExtractHTTPClient(m).Do(req)
 	if err != nil {
 		return "", err