neofs-adm: allow to change parameters of the Policy contract

[fyrchik]

Tested here (will finish testing with actual parameter update check later) https://github.com/nspcc-dev/neofs-adm-tests/tree/set-policy):

$ make clone
$ NEOFS_REPO=https://github.com/fyrchik/neofs-node.git ./test.set-policy.sh neofs-adm-set-policy master

TODO: finish test, add to CI

Signed-off-by: Evgenii Stratonikov evgeniy@nspcc.ru

[codecov]

Codecov Report

Merging #1289 (0d848b9) into master (923db59) will decrease coverage by 0.04%.
The diff coverage is 9.67%.

❗ Current head 0d848b9 differs from pull request most recent head e3cd963. Consider uploading reports for the commit e3cd963 to get more accurate results

@@            Coverage Diff             @@
##           master    #1289      +/-   ##
==========================================
- Coverage   35.48%   35.44%   -0.05%     
==========================================
  Files         310      311       +1     
  Lines       19234    19265      +31     
==========================================
+ Hits         6826     6829       +3     
- Misses      11869    11897      +28     
  Partials      539      539              

Impacted Files	Coverage Δ
cmd/neofs-adm/internal/modules/morph/policy.go	0.00% <0.00%> (ø)
cmd/neofs-adm/internal/modules/morph/root.go	48.62% <42.85%> (-0.40%)	⬇️

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[carpawell]

does it work ok with small value? as I remember small numbers has its own opcodes. or it is ok to write any number as big.Int?

[fyrchik]

big.Int will adjust it's behaviour appropriately. But we still can use int64 here, val is 32-bit.