fix: apply hnsw parameters to the main class not the meta class

[alaeddine-13]

fix: apply hnsw parameters to the main class not the meta class
closes: #336

to test:

da = DocumentArray(storage='weaviate', config={'n_dim': 100, 'ef': 100, 'ef_construction': 100, 'max_connections': 16})

and check the schema:

curl localhost:8080/v1/schema

[codecov]

Codecov Report

Merging #337 (bd4da94) into main (8df37c3) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #337   +/-   ##
=======================================
  Coverage   86.19%   86.19%           
=======================================
  Files         134      134           
  Lines        6316     6316           
=======================================
  Hits         5444     5444           
  Misses        872      872           

Flag	Coverage Δ
docarray	86.19% <ø> (ø)

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Impacted Files	Coverage Δ
docarray/array/storage/weaviate/backend.py	87.39% <ø> (ø)

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[davidbp]

LGTM

[JoanFM]

Do not merge, there should be some test to cover this

[alaeddine-13]

Do not merge, there should be some test to cover this

@JoanFM added, can you re-check ?