Support the pinecone vector store

[vineetk20]

• Added a test file testing-pinecone to test the gptcache functionality.

[sre-ci-robot]

Welcome @vineetk20! It looks like this is your first PR to zilliztech/GPTCache 🎉

[SimFG]

hi, @vineetk20
please make the dev branch as the target branch. and you need put the test case in the tests/unit_tests/manager

[sre-ci-robot]

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[Durga-iB-Analytics]

Any updates on this?

[SimFG]

@Durga-iB-Analytics i think the pr maybe have been deprecated