Add --sarif-group-rules-by-pack flag

Author: edoardopirovano

Diff for: CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## [UNRELEASED]
 
+- Pass the `--sarif-group-rules-by-pack` argument to CodeQL CLI invocations that generate SARIF. This means the SARIF rule object for each query will now be found underneath its corresponding query pack in `runs[].tool.extensions`. [#546](https://github.com/github/codeql-action/pull/546)
 - Output the location of CodeQL databases created in the analyze step. [#543](https://github.com/github/codeql-action/pull/543)
 
 ## 1.0.0 - 31 May 2021

Diff for: lib/codeql.js

@@ -727,6 +727,7 @@ function getCodeQLForCmd(cmd: string): CodeQL {
         "--min-disk-free=1024", // Try to leave at least 1GB free
         "--format=sarif-latest",
         "--sarif-multicause-markdown",
+        "--sarif-group-rules-by-pack",
         `--output=${sarifFile}`,
         addSnippetsFlag,
         // Enable progress verbosity so we log each query as it's interpreted. This aids debugging