[HPO] update to sigopt new experiment api
Author: sywangyi
Pull request: yes

* follow https://docs.sigopt.com/experiments

Signed-off-by: Wang, Yi A <yi.a.wang@intel.com>

# What does this PR do?

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Fixes https://github.com/huggingface/transformers/issues/18145


## Before submitting
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Comments:
@kding1 @yao-matrix @sgugger please have a review

_The documentation is not available anymore as the PR was closed or merged._

Hi @sywangyi, thanks for your contribution 🤗.

The current changes introduce a significant breaking change and we tend to limit them as much as possible.
Still, we though about this and we would like to propose 3 options in order to keep backward compatibility with previous sigopt versions:

1. Introduce a `if sigopt_version < x.y.z` -> previous behaviour `else` -> new behaviour in this PR
2. Split the current implement and the one introduced in this PR in two distinct functions and dispatch to the right one based on the sigopt version
3. Keep only the behaviour introduced in this PR but guard with a version check, raising an error if the version is too old to inform the user to upgrade its dependency.

Please pick one of the suggested options above (_or comment with potential other alternatives 🤓_) and we will be on track for merging 🤗.

Thanks, 
Morgan

@mfuntowicz hi, thanks for the suggestion, and choose option 1 and patch is uploaded

Thanks a lot @sywangyi!

It looks good to me, the failure in the CI seems related but I will let @sgugger have the final word 😃