[CK] Fix/suppress clang lifetimebound warnings with staging compiler. (#6550)

## Motivation

New changes from upstream llvm-project cause an avalanche of warnings in
CK. Gonna disable them by ignoring the
lifetime-safety-intra-tu-suggestions flag until a better permanent
solution is found.

## Technical Details

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## Test Plan

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## Test Result

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## Submission Checklist

- [ ] Look over the contributing guidelines at
https://github.com/ROCm/ROCm/blob/develop/CONTRIBUTING.md#pull-requests.

include/ck/tensor_operation/gpu/thread/threadwise_tensor_slice_transfer.hpp

@@ -12,6 +12,9 @@
 
 #include "ck/tensor_operation/gpu/thread/threadwise_tensor_slice_transfer_util.hpp"
 
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wlifetime-safety-intra-tu-suggestions"
+
 namespace ck {
 // Assume:
 //   1. src:
@@ -2093,3 +2096,5 @@ struct ThreadwiseTensorSliceTransfer_StaticToStatic_IntraRow
 };
 
 } // namespace ck
+
+#pragma clang diagnostic pop