[CK_TILE] Use Unified Workspace for FMHA BWD#182
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Bump composable_kernel submodule to mono-split/users/yiding12/fmha-bwd-workspace HEAD and adapt the FMHA BWD host wrappers to the new unified workspace API: - Replace dq_acc tensor argument with workspace_ptr in get_ck_fmha_bwd_args / get_ck_fmha_varlen_bwd_args - Drop dq_acc strides that have been removed from fmha_bwd_args - In mha_bwd / mha_varlen_bwd, allocate the device workspace based on fmha_bwd_launcher::workspace_size and call launcher.prepare_workspace() - Invoke launcher.run(args, stream_config) instead of fmha_bwd(...)
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Bump composable_kernel submodule to mono-split/users/yiding12/fmha-bwd-workspace
HEAD and adapt the FMHA BWD host wrappers to the new unified workspace API:
/ get_ck_fmha_varlen_bwd_args
fmha_bwd_launcher::workspace_size and call launcher.prepare_workspace()