[Access] Add increment method for monotonous counter

[illia-malachyn]

Add increment method for monotonous counter.

Relates to onflow/flow#1458
Link to issue #5674

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 87.50000% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 55.64%. Comparing base (e4bdb7e) to head (db60345).

Files	Patch %	Lines
engine/access/state_stream/backend/handler.go	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5814      +/-   ##
==========================================
- Coverage   55.65%   55.64%   -0.02%     
==========================================
  Files        1134     1134              
  Lines       89636    89638       +2     
==========================================
- Hits        49890    49882       -8     
- Misses      34956    34968      +12     
+ Partials     4790     4788       -2     

Flag	Coverage Δ
unittests	55.64% <87.50%> (-0.02%)	⬇️

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[illia-malachyn]

It looks like the Access Cohort3 Integration Test is flaky. I've checked other PRs and see it fails regardless of the changes.
The test fails during assertion1 assertion2. The expected value is 10, actual - varies from the run to run.

Update:
The test unexpectedly passed after many retries. I'm pretty sure there's something weird going on. It is reproducible locally.
@peterargue Did you notice such a behavior before?

[durkmurder]

Looks good, some godoc is missing but otherwise all good.