feat: Add retries to download_file.

[prmukherj]

Context

Some arguments like max_retries were missing from download_file method in examples.

Change Summary

Instead of having a local implementation, just use the implementation already in ansys-tools-common by flattening out paths wherever required to match PyFluent's style.

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

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