Sync perform of HNSW/DiskANN

[liliu-z]

Issue: #910

We need to sync the perform of Indexes in Knowhere:

1. When no specific parameter comes in, we use default but valid value. So no exception should be throw out in the case.
2. When a specific parameter comes in, we need to check its validation and throw exception once it is bad.
3. It is not acceptable to modify the parameter if user explicitly write it.

For HNSW:
We simple made the ef range to k - max, and default is min(k, 16).
For DiskANN:
We did the same thing.

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[mergify]

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[liliu-z]

/kind improvement

[liliu-z]

/lgtm

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[cqy123456]

/lgtm