ovmf: Don't define bool type if building in C23 mode

ovmf: Don't define bool type if building in C23 mode

Backport a patch [1] to fix the below build failure:
 /buildarea/tmp/work/corei7-64-wrs-linux/ovmf/edk2-stable202502/sources/ovmf-edk2-stable202502/SecurityPkg/DeviceSecurity/SpdmLib/Include/hal/LibspdmStdBoolAlt.h:13:17: error: two or more data types in declaration specifiers
 13 | typedef BOOLEAN bool;
 | ^~~~
  /buildarea/tmp/work/corei7-64-wrs-linux/ovmf/edk2-stable202502/sources/ovmf-edk2-stable202502/SecurityPkg/DeviceSecurity/SpdmLib/Include/hal/LibspdmStdBoolAlt.h:13:1: error: useless type name in empty declaration [-Werror]
  13 | typedef BOOLEAN bool;

[1] https://github.com/tianocore/edk2/commit/772fa11ac82579a8f6fa171e6b835f68af3f64be

Signed-off-by: Mingli Yu <mingli.yu@windriver.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>