Upstream coreclr and pal changes to support powerpc (ppc64le) architecture (#69105)
* coreclr pal layer chanegs.
* Updated the system arch for power architecture.
* Fixed the failing PAL SXS exception_handling test case
* replaced gint with gint64 to avoid overflow and this has fixed the segmentation fault issue.
* coreclr pal layer chanegs.
* Fixed the failing PAL SXS exception_handling test case
* coreclr pal layer chanegs.
* Updated the system arch for power architecture.
* Fixed the failing PAL SXS exception_handling test case
* replaced gint with gint64 to avoid overflow and this has fixed the segmentation fault issue.
* coreclr pal layer chanegs.
* Fixed the failing PAL SXS exception_handling test case
* Removing intsafe.h file as main does not have this file now.(Already removed in commit
27195f670937c7e21ab68a806396f9d17c57231a)
Co-authored-by: Alhad Deshpande <Alhad.Deshpande1@ibm.com>