logger: add encoding config option

[End-rey]

Closes #2982.

[codecov]

Codecov Report

Attention: Patch coverage is 64.70588% with 6 lines in your changes missing coverage. Please review.

Project coverage is 23.17%. Comparing base (2e583e5) to head (4bf94da).

Files with missing lines	Patch %	Lines
cmd/neofs-node/validate.go	25.00%	2 Missing and 1 partial ⚠️
cmd/neofs-node/config.go	0.00%	2 Missing ⚠️
cmd/neofs-ir/main.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2999      +/-   ##
==========================================
+ Coverage   23.15%   23.17%   +0.01%     
==========================================
  Files         789      789              
  Lines       58815    58830      +15     
==========================================
+ Hits        13619    13633      +14     
- Misses      44312    44313       +1     
  Partials      884      884              

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[carpawell]

Can we also validate that we have read something OK near this:

neofs-node/cmd/neofs-node/validate.go

Lines 21 to 25 in 2e583e5

	_, err := zapcore.ParseLevel(loggerconfig.Level(c))
	if err != nil {
	return fmt.Errorf("invalid logger level: %w", err)
	}