fix google sheet image url (#522)

Author: chiragchhatrala

app/Integrations/Google/Sheets/SpreadsheetManager.php

@@ -129,7 +129,7 @@ protected function setHeaders(string $id, array $headers): static
 
     public function buildRow(array $submissionData): array
     {
-        $formatter = (new FormSubmissionFormatter($this->integration->form, $submissionData))->outputStringsOnly();
+        $formatter = (new FormSubmissionFormatter($this->integration->form, $submissionData))->useSignedUrlForFiles()->outputStringsOnly();
 
         $fields = $formatter->getFieldsWithValue();
 

app/Service/Forms/FormSubmissionFormatter.php

@@ -145,7 +145,7 @@ public function getCleanKeyValue()
                 } else {
                     $returnArray[$field['name']] = $val;
                 }
-            } elseif ($field['type'] == 'files') {
+            } elseif (in_array($field['type'], ['files', 'signature'])) {
                 if ($this->outputStringsOnly) {
                     $formId = $this->form->id;
                     $returnArray[$field['name']] = implode(
@@ -219,7 +219,7 @@ public function getFieldsWithValue()
                 } else {
                     $field['value'] = $val;
                 }
-            } elseif ($field['type'] == 'files') {
+            } elseif (in_array($field['type'], ['files', 'signature'])) {
                 if ($this->outputStringsOnly) {
                     $formId = $this->form->id;
                     $field['value'] = implode(