[SYCL] Add template parameter support for intel_reqd_sub_group_size attribute

Signed-off-by: Soumi Manna <[email protected]>

Author: smanna12

clang/test/SemaOpenCL/invalid-kernel-attrs.cl

@@ -36,7 +36,9 @@ kernel __attribute__((reqd_work_group_size(0,1,2))) void kernel13(){} // expecte
 
 __attribute__((intel_reqd_sub_group_size(8))) void kernel14(){} // expected-error {{attribute 'intel_reqd_sub_group_size' can only be applied to an OpenCL kernel}}
 kernel __attribute__((intel_reqd_sub_group_size(0))) void kernel15() {} // expected-error {{'intel_reqd_sub_group_size' attribute requires a positive integral compile time constant expression}}
+
 kernel __attribute__((intel_reqd_sub_group_size(-1))) void kernel16() {} // expected-error {{'intel_reqd_sub_group_size' attribute requires a positive integral compile time constant expression}}
+
 kernel __attribute__((intel_reqd_sub_group_size(8))) __attribute__((intel_reqd_sub_group_size(16))) void kernel17() {}  //expected-warning{{attribute 'intel_reqd_sub_group_size' is already applied with different parameters}}
 
 __kernel __attribute__((work_group_size_hint(8,-16,32))) void neg1() {} //expected-error{{'work_group_size_hint' attribute requires a non-negative integral compile time constant expression}}