[SYCL][ESIMD] Fix a few issues with scatter(usm, ...)

[sarnex]

Problems found by Gregory (thanks!):

1. There were some duplicated tests, remove those

2. We didn't test non-LSC mask on Gen12

3. We get an ambiguous call because we had an old function that didn't have VS, but the new functions have default VS=1, so we don't need the old one.

4. When we pass a simd_view for the vals, we got a template match failure. This is the same issue we hit in the compile-time tests where even if we have a simd_view overload the compiler can't infer N, so we need to provide T,N anyway, so add that in the tests.

I tested this on Gen12.

[aelovikov-intel]

SYCL Nightly failures on OCL CPU (AMD runner):

Timed Out Tests (1):
  SYCL :: GroupAlgorithm/root_group.cpp

TIMEOUT: SYCL :: GroupAlgorithm/root_group.cpp (1858 of 1858)
******************** TEST 'SYCL :: GroupAlgorithm/root_group.cpp' FAILED ********************
Exit Code: -9
Timeout: Reached timeout of 600 seconds

Command Output (stdout):
--
# RUN: at line 1
/__w/llvm/llvm/toolchain/bin//clang++   -fsycl -fsycl-targets=spir64 /__w/llvm/llvm/llvm/sycl/test-e2e/GroupAlgorithm/root_group.cpp -I . -o /__w/llvm/llvm/build-e2e/GroupAlgorithm/Output/root_group.cpp.tmp.out
# executed command: /__w/llvm/llvm/toolchain/bin//clang++ -fsycl -fsycl-targets=spir64 /__w/llvm/llvm/llvm/sycl/test-e2e/GroupAlgorithm/root_group.cpp -I . -o /__w/llvm/llvm/build-e2e/GroupAlgorithm/Output/root_group.cpp.tmp.out
# note: command had no output on stdout or stderr
# RUN: at line 2
env ONEAPI_DEVICE_SELECTOR=opencl:cpu  /__w/llvm/llvm/build-e2e/GroupAlgorithm/Output/root_group.cpp.tmp.out
# executed command: env ONEAPI_DEVICE_SELECTOR=opencl:cpu /__w/llvm/llvm/build-e2e/GroupAlgorithm/Output/root_group.cpp.tmp.out
# note: command had no output on stdout or stderr
# error: command failed with exit status: -9
# error: command reached timeout: True