[SYCL] Use -fno-discard-value-names in relevant check_device_code tests (#13716)

`REQUIRES: asserts` was a wrong fix because that "feature" is never
set/doesn't exist.

Author: aelovikov-intel

sycl/test/check_device_code/group_load.cpp

@@ -1,9 +1,6 @@
 // NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --functions "group_load" --include-generated-funcs --version 4
 // NOTE: and manually adjusted to follow the related explicit instantiation.
-// RUN: %clangxx -O3 -fsycl -fsycl-device-only -S -emit-llvm -fno-sycl-instrument-device-code  -o - %s | FileCheck %s
-
-// Generated checks have hard-coded basic block names, so need names in the IR.
-// REQUIRES: asserts
+// RUN: %clangxx -O3 -fsycl -fsycl-device-only -fno-discard-value-names -S -emit-llvm -fno-sycl-instrument-device-code  -o - %s | FileCheck %s
 
 // Windows/linux have some slight differences in IR generation (function
 // arguments passing and long/long long differences/mangling) that could

sycl/test/check_device_code/vector/vector_math_ops.cpp

@@ -3,9 +3,7 @@
 // ./llvm/utils/update_cc_test_checks.py --clang=./build/bin/clang
 // ./sycl/test/check_device_code/vector/vector_math_ops.cpp
 
-// RUN: %clangxx -I %sycl_include -S -emit-llvm -fno-sycl-instrument-device-code -Xclang -disable-lifetime-markers -fsycl-device-only %s -o - | FileCheck %s
-
-// REQUIRES: asserts
+// RUN: %clangxx -I %sycl_include -fno-discard-value-names -S -emit-llvm -fno-sycl-instrument-device-code -Xclang -disable-lifetime-markers -fsycl-device-only %s -o - | FileCheck %s
 
 // This test checks
 // (1) the storage type of sycl::vec on device for all data types, and