[question] Parallel jobs and independent caches

### What is your question?

Dear Conan Folks,

First of all Happy New Year!
I have a question, in the documentation I have read: " that the cache is still not concurrent, so parallel jobs or tasks should use independent caches."
If I have a package with multiple platform and variant combination and if I run these cobinations parallely on CI infrastructure(using seperate caches), how shall I collect and upload all the different combinations together?

Right now, I do them sequentially, and so it takes time but its easy to upload.
Is there an example that I can follow ?

Thanks!
Br,
Maitrey

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