RFR: JDK-8300531: Update MSVC optimization flags to match GCC/Clang [v9]

[Justin King]

On Wed, 15 Feb 2023 21:21:47 GMT, Justin King <jcking at openjdk.org> wrote:

>> Update MSVC CFlags to be more consistent with other compilers. Also disables RTTI in a simliar manner to GCC/Clang for the JVM.
>
> Justin King has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Revert usage of /GR-
>   
>   Signed-off-by: Justin King <jcking at google.com>

Okay I updated this change title to be more specific, sorry about that. Just optimization-related flags. I punted on disabling RTTI to [JDK-8302817](https://bugs.openjdk.org/browse/JDK-8302817) as I cannot pinpoint the failure, it seems related to DbgHelp or DbgEng.

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PR: https://git.openjdk.org/jdk/pull/12073