feat: add zvec support

[egolearner]

Hi VectorDBBench maintainers, this PR adds support benchmarking https://github.com/alibaba/zvec with the VectorDBBench testing framework. Please take a look.

[XuanYang-cn]

@egolearner Plz resolve the conflicts in cli/vectordbbench.py

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[egolearner]

Hi @XuanYang-cn, conflicts have been resolved. However, there are some lint errors in files not modified in this PR. Maybe the Black version was updated recently?
https://github.com/zilliztech/VectorDBBench/actions/runs/21169379056/job/60882050657?pr=692

PYTHONPATH=pwd python3 -m black vectordb_bench --check
would reformat /home/runner/work/VectorDBBench/VectorDBBench/vectordb_bench/backend/clients/alisql/alisql.py
would reformat /home/runner/work/VectorDBBench/VectorDBBench/vectordb_bench/backend/clients/mariadb/mariadb.py
would reformat /home/runner/work/VectorDBBench/VectorDBBench/vectordb_bench/backend/clients/hologres/hologres.py
would reformat /home/runner/work/VectorDBBench/VectorDBBench/vectordb_bench/backend/clients/cockroachdb/cockroachdb.py
would reformat /home/runner/work/VectorDBBench/VectorDBBench/vectordb_bench/backend/clients/pgdiskann/pgdiskann.py
would reformat /home/runner/work/VectorDBBench/VectorDBBench/vectordb_bench/backend/clients/pgvector/pgvector.py
would reformat /home/runner/work/VectorDBBench/VectorDBBench/vectordb_bench/backend/clients/tidb/tidb.py
would reformat /home/runner/work/VectorDBBench/VectorDBBench/vectordb_bench/frontend/components/custom/displaypPrams.py
would reformat /home/runner/work/VectorDBBench/VectorDBBench/vectordb_bench/frontend/components/welcome/explainPrams.py
would reformat /home/runner/work/VectorDBBench/VectorDBBench/vectordb_bench/frontend/utils.py

[XuanYang-cn]

@egolearner I'll look into it

[egolearner]

Hi @XuanYang-cn, we have resolved the conflicts, and CI has passed. Please take a look.