Add meter method which returns remaining computation for given computation kind

[turbolent]

For onflow/cadence#2853. See onflow/cadence#2853 (comment)

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 32.14286% with 19 lines in your changes missing coverage. Please review.

Project coverage is 41.15%. Comparing base (6a254ed) to head (7415145).

Files with missing lines	Patch %	Lines
fvm/storage/state/execution_state.go	0.00%	9 Missing ⚠️
fvm/environment/mock/meter.go	0.00%	3 Missing ⚠️
fvm/meter/computation_meter.go	75.00%	2 Missing and 1 partial ⚠️
fvm/environment/meter.go	0.00%	2 Missing ⚠️
fvm/storage/state/transaction_state.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6215   +/-   ##
=======================================
  Coverage   41.14%   41.15%           
=======================================
  Files        2031     2031           
  Lines      179571   179596   +25     
=======================================
+ Hits        73886    73906   +20     
- Misses      99475    99479    +4     
- Partials     6210     6211    +1     

Flag	Coverage Δ
unittests	41.15% <32.14%> (+<0.01%)	⬆️

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[bluesign]

Is this stale?

[janezpodhostnik]

@bluesign ComputationAvailable was added in another PR https://github.com/onflow/flow-go/pull/4861/files#diff-f0abf60d6957bfe1c0f9a9c50108652f85d6515ca786892300f48b76e0144f86R100

[turbolent]

@onflow/flow-cadence-execution PTAL