embassy timer impl is very inaccurate

[t-moe]

Starting with a fresh (template-generated) project, and adding
embassy-time = { version = "0.1.5", features = ["generic-queue"] } to my dependencies,
and with the following code:

use esp_idf_svc::hal::task::block_on;
use embassy_time::{Duration, Timer};

fn main() {
    esp_idf_svc::sys::link_patches();
    esp_idf_svc::log::EspLogger::initialize_default();

    block_on(async {
        for _ in 0..10 {
            log::info!("tick");
            Timer::after(Duration::from_secs(1)).await;
        }
    });
}

I get the output:

I (571) esp_idf_embassy_time: tick
I (2151) esp_idf_embassy_time: tick
I (5311) esp_idf_embassy_time: tick
I (11621) esp_idf_embassy_time: tick
I (24251) esp_idf_embassy_time: tick
I (49501) esp_idf_embassy_time: tick
I (100011) esp_idf_embassy_time: tick

which is very inaccurate.

The same code produces better results when using the esp-idf-svc/embassy-time-isr-queue feature and removing the embassy-time/generic-queue feature

[ivmarkov]

Should be fine now.