fix: benchmark dump test

[cristianmtr]

Fix dumprequest not being propagated to the send ctrl message

Baseline:

### baseline - query time with 1 on 100000 docs ...	         Client@86294[S]:connected to the gateway at 0.0.0.0:55803!
### baseline - query time with 1 on 100000 docs takes 1 second (1.57s)
### baseline - indexing: 100000 docs ...	         Client@86294[S]:connected to the gateway at 0.0.0.0:37613!
### baseline - indexing: 100000 docs takes 9 seconds (9.75s)

Dump / Reload

### indexing 100000 docs takes 17 seconds (17.56s)
### dumping 100000 docs takes 3 seconds (3.27s)
### dump path size: 112.75556 MBs
### reloading 100000 takes 2 seconds (2.50s)

The reason indexing is slower for the DBMSBinaryPb vs Baseline BinaryPb is because we need to pickle both the vector and the metadata before storing them in the underlying KV data structure the BinaryPb uses:

    def add(
        self, ids: List[str], vecs: List[np.array], metas: List[bytes], *args, **kwargs
    ):
        """Add to the DBMS Indexer, both vectors and metadata

        :param ids: the ids of the documents
        :param vecs: the vectors
        :param metas: the metadata, in binary format
        :param args: not used
        :param kwargs: not used
        """
        if not any(ids):
            return

        vecs_metas = [pickle.dumps((vec, meta)) for vec, meta in zip(vecs, metas)]
        self._add(ids, vecs_metas)

[codecov]

Codecov Report

Merging #2307 (1a92d82) into master (82d12e1) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #2307   +/-   ##
=======================================
  Coverage   90.83%   90.83%           
=======================================
  Files         222      222           
  Lines       11740    11740           
=======================================
  Hits        10664    10664           
  Misses       1076     1076           

Flag	Coverage Δ
daemon	51.22% <100.00%> (ø)
jina	91.00% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
jina/types/message/__init__.py	88.20% <100.00%> (ø)

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[maximilianwerk]

LGTM

[github-actions]

Latency summary

Current PR yields:

• 😶 index QPS at 1127, delta to last 3 avg.: -3%
• 😶 query QPS at 19, delta to last 3 avg.: -5%

Breakdown

Version	Index QPS	Query QPS
current	1127	19
1.1.5	1164	20
1.1.4	1172	20

Backed by latency-tracking. Further commits will update this comment.