Roll external/re2/ 6598a8ecd..917047f36 (3 commits) (#5626)

google/re2@6598a8e...917047f

$ git log 6598a8ecd..917047f36 --date=short --no-merges --format='%ad %ae %s'
2024-03-28 junyer Tell Bazel the specific target version of macOS too. Sigh.
2024-03-28 junyer Force a specific target version of macOS.
2024-03-28 junyer Prepare to tag release `2024-04-01`.

Created with:
  roll-dep external/re2

Co-authored-by: GitHub Actions[bot] <>

DEPS

@@ -12,7 +12,7 @@ vars = {
   # Use protobufs before they gained the dependency on abseil
   'protobuf_revision': 'v21.12',
 
-  're2_revision': '6598a8ecd57724c8c7d43b2fca8eb9f9969ce57c',
+  're2_revision': '917047f3606d3ba9e2de0d383c3cd80c94ed732c',
   'spirv_headers_revision': '4f7b471f1a66b6d06462cd4ba57628cc0cd087d7',
 }