PR #9666: [ROCm] Fused convolution+bias+activation
PR #9666: [ROCm] Fused convolution+bias+activation

Imported from GitHub PR https://github.com/openxla/xla/pull/9666

This PR enables MIOpen convolution+bias+activation fusion for ROCm and updates fusion unit tests accordingly.
Copybara import of the project:

--
bd5be494abe6621dfd2c4ebcca4f8992077d8a89 by Eugene Kuznetsov <eugene.kuznetsov@amd.com>:

Switch to NHWC for ROCm and F16

--
8792f892770aba54e38a5352d9bec1d003e341d3 by Eugene Kuznetsov <eugene.kuznetsov@amd.com>:

Fused convolution+bias+activation

Merging this change closes #9666

FUTURE_COPYBARA_INTEGRATE_REVIEW=https://github.com/openxla/xla/pull/9666 from ROCm:ci_fused_conv 8792f892770aba54e38a5352d9bec1d003e341d3
