Update the compiler target, arch, tune for Java 25+

Java 25 for z/OS will be using Open XL 2.2. Java 25 will pre-req z/OS 3.1+
This updates the target level as a result of this requirement.

Updates the architectures and tuning accordingly too.

Signed-off-by: Gaurav Chaudhari <Gaurav.Chaudhari@ibm.com>

Author: Deigue

runtime/cmake/caches/zos_390-64.cmake

@@ -35,6 +35,10 @@ if(JAVA_SPEC_VERSION EQUAL 8)
 	set(OMR_ZOS_COMPILE_TARGET "zOSV1R13" CACHE STRING "")
 	set(OMR_ZOS_COMPILE_ARCHITECTURE 7 CACHE STRING "")
 	set(OMR_ZOS_COMPILE_TUNE 10 CACHE STRING "")
+elseif (JAVA_SPEC_VERSION GREATER_EQUAL 25)
+    set(OMR_ZOS_COMPILE_TARGET "zOSV3R1" CACHE STRING "")
+    set(OMR_ZOS_COMPILE_ARCHITECTURE 12 CACHE STRING "")
+    set(OMR_ZOS_COMPILE_TUNE 15 CACHE STRING "")
 else()
 	set(OMR_ZOS_COMPILE_TARGET "zOSV2R3" CACHE STRING "")
 	set(OMR_ZOS_COMPILE_ARCHITECTURE 10 CACHE STRING "")