[SYCL][E2E] Re-enable interop_all_backends.cpp test

[ayylol]

The capitalization of cuda and hip in Basic/interop/interop_all_backends.cpp makes the test always unsupported. This patch removes the requires line, and refactors how the test is built so that we build an executable for each backend.

[againull]

This way we will build an executable only for hip, or only for cuda, or only for l0.
Probably this line should be split into three lines with different executable names.

[sarnex]

@ayylol Test is failing on HIP in postcommit unfortunately. Think you can fix it quickly? If not let's revert for now

https://github.com/intel/llvm/actions/runs/11523103039/job/32080880588

-- Testing: 2233 tests, 24 workers --
FAIL: SYCL :: Basic/interop/interop_all_backends.cpp (278 of 2233)
******************** TEST 'SYCL :: Basic/interop/interop_all_backends.cpp' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 3 has no command after substitutions
# RUN: at line 4 has no command after substitutions
# RUN: at line 5 has no command after substitutions
# RUN: at line 6
/__w/llvm/llvm/toolchain/bin//clang++  -Werror -Xsycl-target-backend=amdgcn-amd-amdhsa --offload-arch=gfx1031 -fsycl -fsycl-targets=amdgcn-amd-amdhsa  /__w/llvm/llvm/llvm/sycl/test-e2e/Basic/interop/interop_all_backends.cpp -DBUILD_FOR_HIP -o /__w/llvm/llvm/build-e2e/Basic/interop/Output/interop_all_backends.cpp.tmp-hip.out
# executed command: /__w/llvm/llvm/toolchain/bin//clang++ -Werror -Xsycl-target-backend=amdgcn-amd-amdhsa --offload-arch=gfx1031 -fsycl -fsycl-targets=amdgcn-amd-amdhsa /__w/llvm/llvm/llvm/sycl/test-e2e/Basic/interop/interop_all_backends.cpp -DBUILD_FOR_HIP -o /__w/llvm/llvm/build-e2e/Basic/interop/Output/interop_all_backends.cpp.tmp-hip.out
# .---command stderr------------
# | /__w/llvm/llvm/llvm/sycl/test-e2e/Basic/interop/interop_all_backends.cpp:23:22: error: unknown type name 'hipDevice_t'
# |    23 | using nativeDevice = hipDevice_t;
# |       |                      ^
# | /__w/llvm/llvm/llvm/sycl/test-e2e/Basic/interop/interop_all_backends.cpp:24:21: error: unknown type name 'hipStream_t'; did you mean 'ihipStream_t'?
# |    24 | using nativeQueue = hipStream_t;
# |       |                     ^~~~~~~~~~~
# |       |                     ihipStream_t
# | /__w/llvm/llvm/toolchain/bin/../include/sycl/detail/backend_traits_hip.hpp:26:16: note: 'ihipStream_t' declared here
# |    26 | typedef struct ihipStream_t *HIPstream;
# |       |                ^
# | /__w/llvm/llvm/llvm/sycl/test-e2e/Basic/interop/interop_all_backends.cpp:25:21: error: unknown type name 'hipEvent_t'; did you mean 'ihipEvent_t'?
# |    25 | using nativeEvent = hipEvent_t;
# |       |                     ^~~~~~~~~~
# |       |                     ihipEvent_t
# | /__w/llvm/llvm/toolchain/bin/../include/sycl/detail/backend_traits_hip.hpp:27:16: note: 'ihipEvent_t' declared here
# |    27 | typedef struct ihipEvent_t *HIPevent;
# |       |                ^
# | /__w/llvm/llvm/llvm/sycl/test-e2e/Basic/interop/interop_all_backends.cpp:45:22: error: use of undeclared identifier 'nativeDevice'
# |    45 |                      nativeDevice>));
# |       |                      ^
# | 4 errors generated.
# `-----------------------------
# error: command failed with exit status: 1