Ensure we build ub sanitizer builds with -DPEDANTIC

Otherwise we may get spurious results from ub sanitizer. For example we
assume we can tolerate some unaligned write without this define that ub
sanitizer will complain about.

Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com>
Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Hugo Landau <hlandau@openssl.org>
(Merged from #18983)

(cherry picked from commit 17b94de)

.github/workflows/ci.yml

@@ -144,7 +144,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - name: config
-      run: ./config --banner=Configured --debug enable-asan enable-ubsan enable-rc5 enable-md2 enable-ec_nistp_64_gcc_128 enable-fips -DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION && perl configdata.pm --dump
+      run: ./config --banner=Configured --debug enable-asan enable-ubsan enable-rc5 enable-md2 enable-ec_nistp_64_gcc_128 enable-fips -DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION -DPEDANTIC && perl configdata.pm --dump
     - name: make
       run: make -s -j4
     - name: make test