Update atomic functional tests (#262)

* feat: implement function to return number of blocks in grid.

* test: update atomics functional tests
  - Standard atomic tests: `atomic_add`, `atomic_inc`, `fetch_atomic_add`, `fetch_atomic_inc`, and `fetch_compare_and_swap`
  - Bitwise atomic tests:    `atomic_and`, `atomic_or`, `atomic_xor`, fetch_atomic_and`, `fetch_atomic_or`, and `fetch_atomic_xor`
  - Extended atomic tests: `atomic_fetch`, `atomic_set`, and `atomic_swap`

* Added two different address modes for atomics.
* Added all supported data types for atomics tests.


[ROCm/rocshmem commit: 0a4f8a83b9]

projects/rocshmem/tests/functional_tests/tester_arguments.hpp

@@ -39,6 +39,14 @@ enum TeamSplitType {
   ROCSHMEM_TEST_TEAM_ODDEVEN,    // odd-even splitting
 };
 
+/*-----------------------------------------
+ * Atomics Addressing modes (contention model)
+ *-----------------------------------------*/
+enum class AddrMode : int {
+  PerGrid,     // all WGs -> same address
+  PerBlock,    // each WG -> its own address (default)
+};
+
 class TesterArguments {
  public:
   TesterArguments(int argc, char *argv[]);
@@ -69,6 +77,7 @@ public:
   unsigned coal_coef = 64;
   unsigned op_type = 0;
   unsigned shmem_context = rocshmem::ROCSHMEM_CTX_WG_PRIVATE;
+  AddrMode addr_mode = AddrMode::PerBlock;
 
   /**
    * Arguments obtained from rocshmem