WIP feat: implement native format inserts over HTTP

[abonander]

Summary

A short description of the changes with a link to an open issue.

Checklist

Delete items not relevant to your PR:

• Unit and integration tests covering the common scenarios were added
• A human-readable description of the changes was provided so that we can include it in CHANGELOG later
• For significant changes, documentation in README and https://github.com/ClickHouse/clickhouse-docs was updated with further explanations or tutorials

[codecov]

Codecov Report

❌ Patch coverage is 64.48980% with 435 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/native/builder.rs	60.20%	177 Missing and 18 partials ⚠️
src/native/encode.rs	71.39%	101 Missing and 20 partials ⚠️
src/native/utils.rs	24.71%	67 Missing ⚠️
src/native/writer.rs	73.95%	8 Missing and 17 partials ⚠️
src/native/varuint.rs	82.60%	10 Missing and 2 partials ⚠️
src/native/decode.rs	59.25%	11 Missing ⚠️
src/insert_native.rs	86.95%	2 Missing and 1 partial ⚠️
src/native/reader.rs	66.66%	0 Missing and 1 partial ⚠️

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