perf(providers): get response as bytes

[mattsse]

Motivation

uses resp.bytes() instead of resp.text()

text decodes the body and scans the entire body. this is a bit redundant for json since deserialization is expected to fail if anyway

reqwest's json function is also just this:

pub async fn json<T: DeserializeOwned>(self) -> crate::Result<T> {
        let full = self.bytes().await?;

        serde_json::from_slice(&full).map_err(crate::error::decode)
    }

Solution

get bytes and deserialize from_slice, and only convert to String in error case

PR Checklist

• Added Tests
• Added Documentation
• Updated the changelog

[gakonst]

sgtm