Roll external/re2/ 9dc7ae7b5..73031bbc0 (5 commits)

google/re2@9dc7ae7...73031bb

$ git log 9dc7ae7b5..73031bbc0 --date=short --no-merges --format='%ad %ae %s'
2023-08-22 junyer Reset the Bzlmod compatibility level to 1.
2023-08-17 junyer Clean up `__GNUC__` conditions.
2023-08-11 junyer Add support for `(?<name>expr)`.
2023-08-11 junyer Add a `WORKSPACE.bzlmod` file.
2023-08-11 junyer Migrate to Bzlmod.

Created with:
  roll-dep external/re2

DEPS

@@ -12,7 +12,7 @@ vars = {
   # Use protobufs before they gained the dependency on abseil
   'protobuf_revision': 'v21.12',
 
-  're2_revision': '9dc7ae7b52a17b75e3f9249ea85ba578bf42f255',
+  're2_revision': '73031bbc08cb3e3200497be4a50e37d6f3acc1d0',
   'spirv_headers_revision': '45fc02a6c67016b3e5ff6e4896a61544a40f90f8',
 }