Fix Build Warnings for AArch64 (#2242)

This commit links to issue (#2234).

When cross-compiling for AArch64, using gcc 13.3, you encounter three
warnings types that turn into errors:

- maybe-uninitialized
- stringop-truncation
- strict-aliasing

This commit fixes all the warnings found, in regards to the first two
rules. To resolve the warnigns due to strict-aliasing, I am editing the
CMake build system.

Signed-off-by: Antonios Christidis <a-christidis@ti.com>

test_conformance/api/test_wg_suggested_local_work_size.cpp

@@ -208,7 +208,7 @@ int do_test_work_group_suggested_local_size(
     bool (*skip_cond)(size_t), size_t start, size_t end, size_t incr,
     cl_ulong max_local_mem_size, size_t global_work_offset[], num_dims dim)
 {
-    int err;
+    int err = 0;
     size_t test_values[] = { 1, 1, 1 };
     std::string kernel_names[6] = {
         "test_wg_scan_local_work_group_size",