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* Updating BLOCK_SIZE to 1024.
tests/L0/run_optimizers/test_fused_optimizer.py test passes except for bfloat16 for Adam. There seems to be a bug in this test that needs to be resolved.
For now skipping test_bfloat16 for Adam in the unittest.
Ran 17 other tests and ALL other tests pass!
More details on the effects of these changes can be found here -  https://confluence.amd.com/display/MLSE/Apex+Kernel+Optimization

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This commit changes BLOCK_SIZE=1024 ONLY FOR different optimizers.
L2norm kernels (part of LAMB optimizer algorithm) still maintain BLOCK_SIZE=512 otherwise Allclose fails.

* Updating tests/L0/run_optimizers/test_fused_optimizer.py with @skipifRocm to skip test_bfloat16 in Adam.
Co-authored-by: aspanday <aspanday@amd.com>

* add temporary dispatch of double, float, half, bfloat16

* fusedadam of bfloat16

* Add bfloat16 path to FusedAdam

This reverts commit bdd481d1.

correctly not apply bias correction to epsilon(same as recent upstream change)
correctly not apply bias correction to weight decay(consistent with upstream AdamW)
Make adam_w_mode for FusedAdam/LAMB, to do L2 or Weight Decay (Adam vs AdamW)
Correct document reg_inside_moment differently from adam_w_mode in FusedNovoGrad
Removed legacy eps_mode from FusedAdam
Make internal math type float across fused optimizers