Disabling RTTI with MSVC causes some serviceability tests to fail

With GCC and Clang we disable exceptions and RTTI when compiling C++. On Windows we currently do not disable RTTI. In https://github.com/openjdk/jdk/pull/12073 I tried to do so, but for some unknown reason it causes a subset of serviceability agent tests to fail. The exact reasoning is unknown. It seems to have something to do with either DbgHelp or DbgEng, but that is a guesstimate. We should figure out what is going on so we can eventually disable RTTI on Windows, which will reduce the binary size for Hotspot by at least 1 MB.

The tests in question that fail are:
serviceability/sa/ClhsdbCDSCore
serviceability/sa/ClhsdbCDSJstackPrintAll
serviceability/sa/ClhsdbDumpheap
serviceability/sa/ClhsdbFindPC#no-xcomp-core
serviceability/sa/ClhsdbFindPC#no-xcomp-process
serviceability/sa/ClhsdbFindPC#xcomp-core
serviceability/sa/ClhsdbFindPC#xcomp-process
serviceability/sa/ClhsdbInspect
serviceability/sa/ClhsdbJdis
serviceability/sa/ClhsdbJstack#id0
serviceability/sa/ClhsdbJstack#id1
serviceability/sa/ClhsdbJstackXcompStress.java
serviceability/sa/ClhsdbPrintAs
serviceability/sa/ClhsdbSource
serviceability/sa/JhsdbThreadInfoTest
serviceability/sa/TestClhsdbJstackLock
serviceability/sa/TestJhsdbJstackLineNumbers
serviceability/sa/TestJhsdbJstackLock