Reapply "Fix MSAN on github actions (#11708)"

This reverts commit 33c4a6d.

Author: jonathanmetzman

infra/base-images/base-builder/compile

@@ -17,6 +17,8 @@
 
 echo "---------------------------------------------------------------"
 
+sysctl -w vm.mmap_rnd_bits=28
+
 OSS_FUZZ_ON_DEMAND="${OSS_FUZZ_ON_DEMAND:-0}"
 
 # This is a temporary fix: fall back to LLVM14's old pass manager

infra/base-images/base-runner/run_fuzzer

@@ -18,6 +18,8 @@
 # Fuzzer runner. Appends .options arguments and seed corpus to users args.
 # Usage: $0 <fuzzer_name> <fuzzer_args>
 
+sysctl -w vm.mmap_rnd_bits=28
+
 export PATH=$OUT:$PATH
 cd $OUT