add VDMS retriever microservice for v0.9 Milestone

[s-gobriel]

Description

Add VDMS retriever component. Targeting v0.9 milestone. Retriever is part of a megaservice for video QA RAG system.

Issues

List the issue or RFC link this PR is working on. If there is no such link, please mark it as n/a.

Type of change

• [X ] New feature (non-breaking change which adds new functionality)

Dependencies

List the newly introduced 3rd party dependency if exists.

Tests

new test script added to test folder. test-retrievers_langchain_vdms.sh

[s-gobriel]

@chensuyue can you please tag this PR with v0.9 milestone

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Files with missing lines	Coverage Δ
comps/cores/proto/docarray.py	99.12% <100.00%> (+<0.01%)	⬆️

[BaoHuiling]

@XuhuiRen @lvliang-intel Could you help to review the code? Thanks

[lvliang-intel]

@s-gobriel，
Please resolve the conflicts and fix example test issue.

[BaoHuiling]

@s-gobriel please see #538 (comment) to fix the CI test.

[BaoHuiling]

does this VDMS need extra operation to index the data? It seems that this retriever is rely on VDMS vectorstore, plz add the corresponding data indexing code under "dataprep" folder. In this way, the user can get a convenient way to use this retriever and vectorstore.

Hi Xuhui, Sameh is OoO since US holiday today. @srinarayan-srikanthan is planning to raise another PR for dataprep for VDMS, on ww36'4 (ww36'3 in US).

[BaoHuiling]

@s-gobriel， Please resolve the conflicts and fix example test issue.

Hi liang, the conflict and example test is good now

[ttrigui]

@lvliang-intel , can we please merge this PR since all issues are resolved?