Deal Decision Custom Function

[hannahhoward]

Goals

Provides same functionality as #260 but with setting up deal decision logic as a custom option on the provider interface, rather than altering the node interface, understanding this may be something that miners customize on an individual level

Implement

• Use commits from Add a hook to plug in custom deal acceptance logic #260
• Remove custom decider from node interface
• Setup custom decider as a StorageProviderOption
• Add tests to verify state changes

[codecov-commenter]

Codecov Report

Merging #262 into master will decrease coverage by 0.10%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##           master     #262      +/-   ##
==========================================
- Coverage   65.04%   64.95%   -0.09%     
==========================================
  Files          39       39              
  Lines        2288     2302      +14     
==========================================
+ Hits         1488     1495       +7     
- Misses        683      690       +7     
  Partials      117      117              

Impacted Files	Coverage Δ
storagemarket/impl/provider.go	5.40% <0.00%> (-0.16%)	⬇️
storagemarket/impl/providerstates/provider_fsm.go	100.00% <ø> (ø)
storagemarket/types.go	33.34% <ø> (ø)
...oragemarket/impl/providerstates/provider_states.go	85.36% <100.00%> (+0.54%)	⬆️

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