refactor!: avoid using futures crate directly #7955

Job	Run time
check_semver	4m 14s
Checking fmt and docs	1m 34s
Cross compile (i686-unknown-linux-gnu)	5m 43s
clippy_check	2m 36s
Cross compile (armv7-linux-androideabi)	56s
Minimal Supported Rust Version	2m 2s
Cross compile (aarch64-linux-android)	56s
cargo deny	30s
Run network simulations/benchmarks	8m 1s
CI Test Suite / Tests (ubuntu-latest, stable, all)	3m 40s
CI Test Suite / Tests (ubuntu-latest, stable, none)	2m 33s
CI Test Suite / Tests (windows-latest, stable, all, x86_64-pc-windows-msvc)	1s
CI Test Suite / Tests (ubuntu-latest, stable, default)	3m 31s
CI Test Suite / Tests (windows-latest, stable, none, x86_64-pc-windows-msvc)	1s
CI Test Suite / Tests (macOS-arm-latest, stable, all)	3m 57s
CI Test Suite / Tests (windows-latest, stable, default, x86_64-pc-windows-msvc)	1s
CI Test Suite / Tests (macOS-arm-latest, stable, none)	3m 42s
CI Test Suite / Tests (macOS-arm-latest, stable, default)	3m 3s
	47m 1s

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