Fix docker images

[LLukas22]

Fixes #247

Since we now depend on pyo3 in core we need to include libpython in our runtime container.

Maybe we could put this pyo3 dependency behind a feature flag in the future, as it is currently necessary to have libpython available to compile/run the project even if mistralrs-pyo3 is excluded from the compilation.

[github-actions]

Code Metrics Report

  ───────────────────────────────────────────────────────────────────────────────
Language                 Files     Lines   Blanks  Comments     Code Complexity
───────────────────────────────────────────────────────────────────────────────
Rust                        70     23589     1555       510    21524       1309
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Total                       70     23589     1555       510    21524       1309
───────────────────────────────────────────────────────────────────────────────
Estimated Cost to Develop 77,898
Estimated Schedule Effort 11.864694 months
Estimated People Required 5.076026
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Processed 779680 bytes, 0.780 megabytes (SI)
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[EricLBuehler]

Thanks, this looks great. I agree that we should try to make the pyo3 support in mistralrs-core a feature, I'll probably submit a PR.