Support different strength for Stable Diffusion TensorRT Inpainting pipeline

[jinwonkim93]

What does this PR do?

This PR support examples/community/stable_diffusion_tensorrt_inpaint.py to run in different strength (0~1).

Fixes # (issue)

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Who can review?

@patrickvonplaten

[HuggingFaceDocBuilderDev]

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

[patrickvonplaten]

@asfiyab-nvidia could you have a look here? :-)

[asfiyab-nvidia]

Thanks for the ping - I can drop some review comments in the next few days

[asfiyab-nvidia]

LGTM. Thanks for the contribution @jinwonkim93
@patrickvonplaten approving these changes

[patrickvonplaten]

Thanks @asfiyab-nvidia