Disable tonic default features who introduces outdated axum

[artiga033]

This is to avoid having to introduce indirect dependency of axum, which is often not the latest if fron tonic->tower->axum.

Say if a downstream project which is a http web server based on axum, but they don't need grpc so as to tonic so they have the latest version of axum(v0.8 as of now). However as qdrant-client depends on tonic thus tower->axum(v0.7), the end project will have two axum dependency.

Anyway I think that we don't need server features as a client after all.

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