Move sampler and command queue compatibility query tests to the main api suite (#509)

...and mark tests that exercise new-style entrypoints as requiring 2.0

These tests give us (or rather will give us once made exhaustive, see
#508) coverage for both new-style and old-style creation entrypoints,
making the entrypoint used in other tests irrelevant as long as the
old-style entrypoints are required to be implemented.

Signed-off-by: Kévin Petit <kpet@free.fr>

test_conformance/api/CMakeLists.txt

@@ -6,6 +6,7 @@ set(${MODULE_NAME}_SOURCES
          test_retain.cpp
          test_retain_program.c
          test_queries.cpp
+         test_queries_compatibility.cpp
          test_create_kernels.c
          test_kernels.c
          test_api_min_max.c