Change FP8 Defaults

[cuichenx]

What does this PR do ?

Change the certain FP8 parameter defaults to more recommended values so that new users can find the optimal FP8 recipe faster.

Collection: NLP

Changelog

• Change all defaults of fp8_amax_history_len from 1 to 1024
• Change all defaults of fp8_amax_compute_algo from 'most_recent' to 'max'
• Change config defaults of fp8_hybrid to True to mark that hybrid is the preferred fp8 mode (note fp8 is still False so by default FP8 is still off.)

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• Bugfix
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[ericharper]

LGTM. Thanks!

[ericharper]

jenkins