[backup] Use blob client

Summary:
ENG-3687
Use new http blob client

Depends on D8882

Test Plan:
Add logging in main and check if url was set correctly when running
cargo run
cargo run -- --blob-service-url localhost:123
Check if it fails when running
cargo run -- --blob-service-url localhost:123asd

Try sending some data using blob client and check if it worked

Reviewers: bartek, kamil, patryk, jon

Reviewed By: bartek, jon

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D8883