As `talosctl time` relies on default time server set in the config, and
our nodes start with `pool.ntp.org`, sometimes request to the timeserver
fails failing the tests.
Retry such errors in the tests to avoid spurious failures.
Signed-off-by: Andrey Smirnov <andrey.smirnov@talos-systems.com>
Fixes#4688
Instead of using generic library, build some handcrafted code to
reuse buffers, do partial parsing of the data we need for the processes
API.
Benchmark (it runs with significant number of processes on the host):
```
name time/op
PrometheusProcfs-16 3.42ms ± 8%
Processes-16 2.36ms ± 5%
name alloc/op
PrometheusProcfs-16 366kB ± 0%
Processes-16 255kB ± 0%
name allocs/op
PrometheusProcfs-16 6.76k ± 0%
Processes-16 3.83k ± 0%
```
Signed-off-by: Andrey Smirnov <andrey.smirnov@talos-systems.com>
