No big deal, but it is called multiple times in sorting routine, this
easily results in 20 allocations per group traversal.
```
goos: linux
goarch: amd64
pkg: git.frostfs.info/TrueCloudLab/frostfs-node/pkg/network
cpu: 11th Gen Intel(R) Core(TM) i5-1135G7 @ 2.40GHz
│ old │ new │
│ sec/op │ sec/op vs base │
AddressTLSEnabled-8 184.6n ± 1% 103.3n ± 6% -44.04% (p=0.000 n=10)
│ old │ new │
│ B/op │ B/op vs base │
AddressTLSEnabled-8 704.0 ± 0% 0.0 ± 0% -100.00% (p=0.000 n=10)
│ old │ new │
│ allocs/op │ allocs/op vs base │
AddressTLSEnabled-8 1.000 ± 0% 0.000 ± 0% -100.00% (p=0.000 n=10)
```
Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>