Use go env GOPATH to read GOPATH (#4072)

Fixes and issue with go modules being installed into the project root
during linting when `GOPATH` is not set.

Author: m1kola

scripts/evergreen/lint_code.sh

@@ -1,8 +1,6 @@
 #!/usr/bin/env bash
 set -Eeou pipefail
 
-export GOPATH=${GOPATH:-${workdir}}
-
 # Set required version
 required_version="v1.61.0"
 
@@ -17,10 +15,9 @@ fi
 echo "Go Version: $(go version)"
 
 echo "Running golangci-lint..."
-if PATH=${GOPATH}/bin:${PATH} golangci-lint run --fix; then
+if PATH=$(go env GOPATH)/bin:${PATH} golangci-lint run --fix; then
     echo "No issues found by golangci-lint."
 else
     echo "golangci-lint found issues or made changes."
     exit 1
 fi
-

scripts/evergreen/update_licenses.sh

@@ -20,7 +20,7 @@ process_licenses() {
         return 1
     fi
 
-    PATH=${GOPATH}/bin:${PATH} GOOS=linux GOARCH=amd64 GOFLAGS="-mod=mod" go-licenses report . --template "${SCRIPTS_DIR}/update_licenses.tpl" > licenses_full.csv 2> licenses_stderr  || true
+    PATH=$(go env GOPATH)/bin:${PATH} GOOS=linux GOARCH=amd64 GOFLAGS="-mod=mod" go-licenses report . --template "${SCRIPTS_DIR}/update_licenses.tpl" > licenses_full.csv 2> licenses_stderr  || true
 
     # Filter and sort the licenses report
     grep -v 10gen licenses_full.csv | grep -v "github.com/mongodb" | grep -v "^golang.org" | sort > licenses.csv || true