Fix stash scraper errors and add apikey field (#5474)

* Use hasura/go-graphql-client instead of shurcooL version
* Fix graphql query errors
* Support setting api key for stash server

pkg/scraper/graphql.go

@@ -0,0 +1,55 @@
+package scraper
+
+import (
+	"errors"
+	"strings"
+
+	"github.com/hasura/go-graphql-client"
+)
+
+type graphqlErrors []error
+
+func (e graphqlErrors) Error() string {
+	b := strings.Builder{}
+	for _, err := range e {
+		_, _ = b.WriteString(err.Error())
+	}
+	return b.String()
+}
+
+type graphqlError struct {
+	err graphql.Error
+}
+
+func (e graphqlError) Error() string {
+	unwrapped := e.err.Unwrap()
+	if unwrapped != nil {
+		var networkErr graphql.NetworkError
+		if errors.As(unwrapped, &networkErr) {
+			if networkErr.StatusCode() == 422 {
+				return networkErr.Body()
+			}
+		}
+	}
+	return e.err.Error()
+}
+
+// convertGraphqlError converts a graphql.Error or graphql.Errors into an error with a useful message.
+// graphql.Error swallows important information, so we need to convert it to a more useful error type.
+func convertGraphqlError(err error) error {
+	var gqlErrs graphql.Errors
+	if errors.As(err, &gqlErrs) {
+		ret := make(graphqlErrors, len(gqlErrs))
+		for i, e := range gqlErrs {
+			ret[i] = convertGraphqlError(e)
+		}
+		return ret
+	}
+
+	var gqlErr graphql.Error
+	if errors.As(err, &gqlErr) {
+		return graphqlError{gqlErr}
+	}
+
+	return err
+}