adm: never use GetContractStateByID(1) to retrieve NNS hash

[roman-khimov]

And use a bit more of NNS wrapper.

Notice that this changes "alphabet X" to "alphabetX" in dump output, but I consider this to be an improvement (since that's the contract name).

It also deoptimizes some carefully crafted code to extract a number of names in one call. Likely it's not a performance issue you care about and it's actually somewhat broken in that it assumes one result per invocation (but you can get zero or more than one).

Many more things can be improved, but let's start with this.

Refs. #2826.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 108 lines in your changes are missing coverage. Please review.

Project coverage is 23.65%. Comparing base (dd9cee4) to head (1eace4a).
Report is 9 commits behind head on master.

Files	Patch %	Lines
...md/neofs-adm/internal/modules/morph/dump_hashes.go	0.00%	15 Missing ⚠️
...neofs-adm/internal/modules/morph/initialize_nns.go	0.00%	15 Missing ⚠️
cmd/neofs-adm/internal/modules/morph/deploy.go	0.00%	13 Missing ⚠️
cmd/neofs-adm/internal/modules/morph/container.go	0.00%	9 Missing ⚠️
cmd/neofs-adm/internal/modules/morph/initialize.go	0.00%	9 Missing ⚠️
cmd/neofs-adm/internal/modules/morph/config.go	0.00%	8 Missing ⚠️
cmd/neofs-adm/internal/modules/morph/balance.go	0.00%	7 Missing ⚠️
...fs-adm/internal/modules/morph/initialize_deploy.go	0.00%	6 Missing ⚠️
cmd/neofs-adm/internal/modules/morph/estimation.go	0.00%	5 Missing ⚠️
...d/neofs-adm/internal/modules/morph/renew_domain.go	0.00%	5 Missing ⚠️
... and 4 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2841      +/-   ##
==========================================
- Coverage   31.34%   23.65%   -7.70%     
==========================================
  Files         435      769     +334     
  Lines       32639    44564   +11925     
==========================================
+ Hits        10231    10541     +310     
- Misses      21517    33172   +11655     
+ Partials      891      851      -40     

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