Support delete / update, attribute filtering and search by id

[youny626]

• Support delete and update operations
• Support attribute filtering
• Support search by user-provided id
• Support deduplication of user-provided id

Design doc:
https://docs.google.com/document/d/1CDKdTj_DnE90YaZrPgsMaphqOTkMdbKETNrsFKj_Bco/edit?usp=sharing

Related issues: #2, #124, #1084 , milvus-io/pymilvus#113, milvus-io/milvus-sdk-java#59

[cleomart]

Do you know when will the delete/update operation feature be implemented?

[yamasite]

@cleomart Milvus 0.7.0 will support this feature. Please stay tuned！

[cleomart]

@yamasite Do you have an approximate date of the release? Thank you in advance.

[yamasite]

@JinHai-CN Could you please help answer @cleomart 's question? Do we have an approximate date for Milvus 0.7.0 release?

[JinHai-CN]

We plan to Milvus 0.7.0 in the early of March.

[JinHai-CN]

Only DeleteByID, GetVectorByID and SearchByID can be supported in 0.7.0.

Filtering data would be another issue.