Renaming iree_hal_executable_spec_t -> .._params_t. (#8470)

Matches the style of other parameter structs.
diff --git a/experimental/rocm/native_executable.c b/experimental/rocm/native_executable.c
index 5f11668..04b7856 100644
--- a/experimental/rocm/native_executable.c
+++ b/experimental/rocm/native_executable.c
@@ -46,10 +46,10 @@
 
 iree_status_t iree_hal_rocm_native_executable_create(
     iree_hal_rocm_context_wrapper_t* context,
-    const iree_hal_executable_spec_t* executable_spec,
+    const iree_hal_executable_params_t* executable_params,
     iree_hal_executable_t** out_executable) {
   IREE_ASSERT_ARGUMENT(context);
-  IREE_ASSERT_ARGUMENT(executable_spec);
+  IREE_ASSERT_ARGUMENT(executable_params);
   IREE_ASSERT_ARGUMENT(out_executable);
   *out_executable = NULL;
   IREE_TRACE_ZONE_BEGIN(z0);
@@ -58,7 +58,7 @@
 
   // TODO: Verify the flat buffer.
   iree_ROCMExecutableDef_table_t executable_def =
-      iree_ROCMExecutableDef_as_root(executable_spec->executable_data.data);
+      iree_ROCMExecutableDef_as_root(executable_params->executable_data.data);
 
   // Create the kernel module.
   flatbuffers_string_t hsaco_image =
@@ -96,8 +96,9 @@
       executable->entry_functions[i].block_size_y = block_sizes_vec[i].y;
       executable->entry_functions[i].block_size_z = block_sizes_vec[i].z;
       executable->executable_layouts[i] =
-          executable_spec->executable_layouts[i];
-      iree_hal_executable_layout_retain(executable_spec->executable_layouts[i]);
+          executable_params->executable_layouts[i];
+      iree_hal_executable_layout_retain(
+          executable_params->executable_layouts[i]);
     }
   }
 
diff --git a/experimental/rocm/native_executable.h b/experimental/rocm/native_executable.h
index 4ebf017..59882b7 100644
--- a/experimental/rocm/native_executable.h
+++ b/experimental/rocm/native_executable.h
@@ -22,7 +22,7 @@
 // kernels that can be extracted along with the associated block size.
 iree_status_t iree_hal_rocm_native_executable_create(
     iree_hal_rocm_context_wrapper_t* context,
-    const iree_hal_executable_spec_t* executable_spec,
+    const iree_hal_executable_params_t* executable_params,
     iree_hal_executable_t** out_executable);
 
 hipFunction_t iree_hal_rocm_native_executable_for_entry_point(
diff --git a/experimental/rocm/nop_executable_cache.c b/experimental/rocm/nop_executable_cache.c
index cc8f047..5b5eca3 100644
--- a/experimental/rocm/nop_executable_cache.c
+++ b/experimental/rocm/nop_executable_cache.c
@@ -72,12 +72,12 @@
 
 static iree_status_t iree_hal_rocm_nop_executable_cache_prepare_executable(
     iree_hal_executable_cache_t* base_executable_cache,
-    const iree_hal_executable_spec_t* executable_spec,
+    const iree_hal_executable_params_t* executable_params,
     iree_hal_executable_t** out_executable) {
   iree_hal_rocm_nop_executable_cache_t* executable_cache =
       iree_hal_rocm_nop_executable_cache_cast(base_executable_cache);
   return iree_hal_rocm_native_executable_create(
-      executable_cache->context, executable_spec, out_executable);
+      executable_cache->context, executable_params, out_executable);
 }
 
 static const iree_hal_executable_cache_vtable_t