[MMSIG] Add new configuration files for StyleGAN2

[xiaomile]

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Motivation

Add new configs of StyleGAN2

The output of config_validate.py:

The output of demo.py:

Modification

Please briefly describe what modification is made in this PR.

BC-breaking (Optional)

Does the modification introduce changes that break the backward-compatibility of the downstream repositories?
If so, please describe how it breaks the compatibility and how the downstream projects should modify their code to keep compatibility with this PR.

Use cases (Optional)

If this PR introduces a new feature, it is better to list some use cases here, and update the documentation.

Checklist

Submitting this pull request means that,

Before PR:

• I have read and followed the workflow indicated in the CONTRIBUTING.md to create this PR.
• Pre-commit or linting tools indicated in CONTRIBUTING.md are used to fix the potential lint issues.
• Bug fixes are covered by unit tests, the case that causes the bug should be added in the unit tests.
• New functionalities are covered by complete unit tests. If not, please add more unit test to ensure the correctness.
• The documentation has been modified accordingly, including docstring or example tutorials.

After PR:

• If the modification has potential influence on downstream or other related projects, this PR should be tested with some of those projects.
• CLA has been signed and all committers have signed the CLA in this PR.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (ef68f11) 75.70% compared to head (30a4254) 78.41%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2057      +/-   ##
==========================================
+ Coverage   75.70%   78.41%   +2.71%     
==========================================
  Files         441      441              
  Lines       32295    32356      +61     
  Branches     5082     5082              
==========================================
+ Hits        24449    25373     +924     
+ Misses       6775     5759    -1016     
- Partials     1071     1224     +153     

Flag	Coverage Δ
unittests	78.41% <100.00%> (+2.71%)	⬆️

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[zengyh1900]

lgtm