proxysql: use vendored re2

follow-up to 33614fda223ffee95787f9babeae1d6904d93a08

pkgs/servers/sql/proxysql/default.nix

···
 , perl
 , python3
 , prometheus-cpp
-, re2
 , zlib
 , texinfo
 }:
···
           { f = "lz4"; p = lz4; }
           { f = "pcre"; p = pcre; }
           { f = "prometheus-cpp"; p = prometheus-cpp; }
-          { f = "re2"; p = re2; }
         ]
       )}
 

pkgs/servers/sql/proxysql/makefiles.patch

···
  	cd prometheus-cpp/prometheus-cpp && patch -p1 < ../serial_exposer.patch
  	cd prometheus-cpp/prometheus-cpp && patch -p1 < ../registry_counters_reset.patch
  	cd prometheus-cpp/prometheus-cpp && patch -p1 < ../fix_old_distros.patch
-@@ -321,10 +289,6 @@ prometheus-cpp: prometheus-cpp/prometheus-cpp/lib/libprometheus-cpp-core.a
- 
- 
- re2/re2/obj/libre2.a:
--	cd re2 && rm -rf re2-*/ || true
--	cd re2 && tar -zxf re2-*.tar.gz
--#	cd re2/re2 && sed -i -e 's/-O3 -g /-O3 -fPIC /' Makefile
--#	cd re2/re2 && patch util/mutex.h < ../mutex.h.patch
- 	cd re2/re2 && patch re2/onepass.cc < ../onepass.cc-multiplication-overflow.patch
- ifeq ($(UNAME_S),Darwin)
- 	cd re2/re2 && sed -i '' -e 's/-O3 -g/-O3 -g -std=c++11 -fPIC -DMEMORY_SANITIZER -DRE2_ON_VALGRIND /' Makefile
 @@ -339,8 +303,6 @@ re2: re2/re2/obj/libre2.a