Roll external/re2/ 5723bb895..d2836d1b1 (11 commits)

https://github.com/google/re2/compare/5723bb895031...d2836d1b1c34

$ git log 5723bb895..d2836d1b1 --date=short --no-merges --format='%ad %ae %s'
2022-10-10 jimquinn custom comparator for prefilter exact strings
2022-10-06 jimquinn reduce string copies in prefilter
2022-09-14 junyer Update Unicode data to 15.0.0.
2022-08-26 junyer Add Clang 15 to the build matrix.
2022-08-24 junyer Document why `RE2` objects are neither copyable nor movable.
2022-08-08 junyer Address some more `-Wunreachable-code` warnings.
2022-08-05 junyer Attempt to address some `-Wunreachable-code` warnings.
2022-08-04 junyer Remove the use of `six` from `unicode.py`.
2022-08-03 junyer Remove guards for SWIG.
2022-06-03 hannahshisfb fix 64 to 32 bit clang conversion warning
2022-05-31 junyer Optimise the layout of the `RE2` class.

Created with:
  roll-dep external/re2

DEPS

diff --git a/DEPS b/DEPS
index 051a5be..e054df4 100644
--- a/DEPS
+++ b/DEPS
@@ -5,7 +5,7 @@
 
   'effcee_revision': '35912e1b7778ec2ddcff7e7188177761539e59e0',
   'googletest_revision': 'd9bb8412d60b993365abb53f00b6dad9b2c01b62',
-  're2_revision': '5723bb8950318135ed9cf4fc76bed988a087f536',
+  're2_revision': 'd2836d1b1c34c4e330a85a1006201db474bf2c8a',
   'spirv_headers_revision': '4bd8fc0c8c266ecc6fc50193e65fe6a2fff8e4bc',
 }