[FEATURE] Support table partition about milvus HOT 2 CLOSED

create_table({'table_name': "tag_tbl", 'dimension': 512, 'index_file_size': 1024, 'metric_type':MetricType.L2}); // old api no change

create_partition({'table_name':"tag_tbl", 'partition_name': "sub_tag_1", 'tag':"aaa"}); //new api

create_partition({'table_name':"tag_tbl", 'partition_name': "sub_tag_2", 'tag':"bbb"}); 

add_vector(table_name="tag_tbl", records=vec_list, ids=vec_ids, partition_tag="aaa"); //old api add a parameter

search_vectors(table_name="tag_tbl", query_records=query_vectors, top_k=k, nprobe=p, partition_tags=["aaa", "bbb"]); //old api add a parameter

show_partitions(table_name="tag_tbl"); //new api

delete_partion(table_name="tag_tbl", 'partition_name': "sub_tag_2"); //new api

A table can be partitioned even it already has data
If partition not specified, vectors will be inserted into parent table
If add_vectors api specify a non-exist tag, vectors will be inserted into parent table
Sub table index parameters are inherited from parent table
Delete parent table will also delete its sub-tables and all data
create_index("tag_tbl") specify the parent table and its sub-tables by same index parameter
search_vectors parameter partition_tags must support regex match

Status CreatePartition(const std::string& table_name, const std::string& partition_name, const std::string& tag);

Status DropPartition(const std::string& table_name, const std::string& partition_name);

Status ShowPartitions(const std::string& table_name, std::vector<meta::TableSchema>& partiton_schema_array);

      Handle partition for Insert interface:

Status InsertVectors(const std::string& table_name, const std::string& partition_tag, uint64_t n, const float* data, IDNumbers& vector_ids) {

    if(tag.empty()) {

        //normal table insert

    } else {

        std::string partition_name = meta_->GetPartitionName(table_name, tag);

        mem_mgr_->InsertVectors(partition_name, n, data, vector_ids);

    }

}

Status Query(const std::string& table_name, const std::string& partition_tag, uint64_t topk, uint64_t nq, uint64_t nprobe, const float* data, QueryResults& results) {

 meta::DatePartionedTableFilesSchema files;

std::vector<size_t> ids;

auto status = meta_ptr_->FilesToSearch(table_id, partition_tag, ids, dates, files);

// do search

}

Status CreatePartition(const std::string& table_name, const std::string& partition_name, const std::string& tag);

Status DropPartition(const std::string& table_name, const std::string& partition_name);

Status ShowPartitions(const std::string& table_name, std::vector<meta::TableSchema>& partiton_schema_array);

Status GetPartitionName(const std::string& table_name, const std::string& tag, std::string& partition_name);

Status FilesToSearch(const std::string& table_id, const std::string& partition_tag, const std::vector<size_t>& ids, const DatesT& dates, DatePartionedTableFilesSchema& files) {

//step1: get files from parent table

//step2:select partitions from meta, get files from partitions

}