[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

<!-- Explain any relevant testing done to verify this PR. -->

## 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.

example/36_sparse_embedding/sparse_embedding3_forward_layernorm.cpp

@@ -19,6 +19,9 @@
 #include "ck/library/utility/host_tensor_generator.hpp"
 #include "ck/library/reference_tensor_operation/cpu/reference_sparse_embedding3_forward_layernorm.hpp"
 
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wlifetime-safety-intra-tu-suggestions"
+
 using ::ck::DeviceMem;
 using ::ck::HostTensorDescriptor;
 using ::ck::Tensor;
@@ -218,3 +221,4 @@ int main(int argc, char* argv[])
 
     return 0;
 }
+#pragma clang diagnostic pop