[Enhancement] Fix text2image inferencer + disco diffusion GPU test

[LeoXing1996]

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Motivation

guider.py relay torchvision.transforms > 0.7.0.

Modification

Skip unit test when torchvision.__version__ is less than or equal to 0.7.0.

Who can help? @ them here!

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

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.

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

Base: 88.04% // Head: 88.02% // Decreases project coverage by -0.01% ⚠️

Coverage data is based on head (3ec6128) compared to base (b2333a8).
Patch coverage: 28.57% of modified lines in pull request are covered.

❗ Current head 3ec6128 differs from pull request most recent head de45ec4. Consider uploading reports for the commit de45ec4 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           dev-1.x    #1523      +/-   ##
===========================================
- Coverage    88.04%   88.02%   -0.02%     
===========================================
  Files          383      383              
  Lines        24176    24183       +7     
  Branches      3793     3794       +1     
===========================================
+ Hits         21285    21287       +2     
- Misses        2076     2081       +5     
  Partials       815      815              

Flag	Coverage Δ
unittests	88.02% <28.57%> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
mmedit/models/editors/disco_diffusion/guider.py	17.69% <28.57%> (+0.34%)	⬆️

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[liuwenran]

good idea. thanks