make interpret-results single-threaded

lib/codeql.js

@@ -563,11 +563,11 @@ async function getCodeQLForCmd(cmd, checkVersion) {
             codeqlArgs.push(querySuitePath);
             await runTool(cmd, codeqlArgs);
         },
-        async databaseInterpretResults(databasePath, querySuitePaths, sarifFile, addSnippetsFlag, threadsFlag, automationDetailsId) {
+        async databaseInterpretResults(databasePath, querySuitePaths, sarifFile, addSnippetsFlag, _threadsFlag, automationDetailsId) {
             const codeqlArgs = [
                 "database",
                 "interpret-results",
-                threadsFlag,
+                "--threads=1",
                 "--format=sarif-latest",
                 "-v",
                 `--output=${sarifFile}`,

src/codeql.ts

@@ -872,13 +872,13 @@ async function getCodeQLForCmd(
       querySuitePaths: string[],
       sarifFile: string,
       addSnippetsFlag: string,
-      threadsFlag: string,
+      _threadsFlag: string,
       automationDetailsId: string | undefined
     ): Promise<string> {
       const codeqlArgs = [
         "database",
         "interpret-results",
-        threadsFlag,
+        "--threads=1",
         "--format=sarif-latest",
         "-v",
         `--output=${sarifFile}`,