[tune](deps): Bump ax-platform from 0.1.20 to 0.2.6 in /python/requirements/tune

[dependabot]

Bumps ax-platform from 0.1.20 to 0.2.6.

Release notes

Sourced from ax-platform's releases.

v0.2.6 Release

Bugfixes and incremental improvements. Now using botorch v0.6.6

v0.2.5 Release

Bugfixes and incremental improvements

v0.2.4 Release

• Bugfixes
• Changes to saving custom Metrics and Runners (see Developer API Tutorial for details)

v0.2.3 Release

• Bugfixes
• SAASBO fixes
• Updates to Scheduler (base class now works standalone, with polling functionality delegated to runner)
• Early-stopping support in Service API

v0.2.2 Release

Bugfixes + support for Pareto frontier extraction in Ax Service API

v0.2.1: Release

What’s new?

1. Support Multi-Objective Optimizations for the Service API.
2. Deprecation of SimpleExperiment
3. Several minor tutorial and documentation corrections.
4. Documentation is no longer released with errors in tutorials.

Bugfixes

• IndexError when only using a subset of fields in raw data (facebook/Ax#652)

v0.2.0 Release

What’s new?

1. Modular BotAx + tutorial: new flexible setup for combining BoTorch subcomponents into a Model in Ax,
2. Scheduler + tutorial: new standalone configurable manager abstraction to run asynchronous closed-loop experiments with Ax (with or without human-in-the-loop),
3. GenerationStrategy tutorial: walkthrough for optimization algorithms specification in in Ax,
4. Bayesian optimization with categorical kernels exposed in Ax and auto-selected in Service and Loop APIs (via choose_generation_strategy). This eliminates the need to opt for Sobol quasi-random search when a given search space contains predominantly choice (a.k.a. categorical or discrete) parameters,
5. Scalarized outcome constraint support (feature request: facebook/Ax#472),
6. Extended exp_to_df utility to conveniently display an Ax Experiment as a dataframe of trials and arms.

Bugfixes

• Abandoned arms and trials exclusion from modeling data (facebook/Ax#506),
• Changing a range parameter to fixed (facebook/Ax#383).

Commits

• 4071495 Update PyPA "publish to PyPi" github action (#1073)
• 2b8c23c avoid scheduler failure due to missing metric value (#1061)
• 5a09b22 Bump BoTorch version prior to release (#1071)
• 40e7ac5 removing num_gp_sample from the plot function (#1050)
• 2d42e9d Split "utils/commmon_no_pytorch" target (#1031)
• d2ef365 Move torch-dependent utility out of "core_utils" and into "modelbridge_utils"...
• 83e36bf use Ax transforms in ES strategy (#1067)
• 9288d25 MapTorchModelBridge (#1064)
• ad56b30 cosmetic changes to Base ModelBridge and TorchModelBridge (#1063)
• 8f44715 Change default seconds between polls to 5 minutes across the board (#1070)
• Additional commits viewable in compare view

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[dependabot]

Superseded by #89.