Adds support for async triggers

[invisig0th]

No description provided.

[codecov]

Codecov Report

Merging #2464 (0868f1e) into master (f1292d7) will decrease coverage by 0.11%.
The diff coverage is 98.96%.

@@            Coverage Diff             @@
##           master    #2464      +/-   ##
==========================================
- Coverage   97.17%   97.05%   -0.12%     
==========================================
  Files         194      194              
  Lines       35990    36054      +64     
==========================================
+ Hits        34972    34991      +19     
- Misses       1018     1063      +45     

Flag	Coverage Δ
linux	97.05% <98.96%> (-0.01%)	⬇️
linux_replay	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
synapse/lib/view.py	94.27% <97.91%> (-0.34%)	⬇️
synapse/cortex.py	96.37% <100.00%> (-0.66%)	⬇️
synapse/lib/cell.py	97.82% <100.00%> (+<0.01%)	⬆️
synapse/lib/lmdbslab.py	99.71% <100.00%> (+<0.01%)	⬆️
synapse/lib/storm.py	98.41% <100.00%> (-0.06%)	⬇️
synapse/lib/stormtypes.py	98.65% <100.00%> (+<0.01%)	⬆️
synapse/lib/trigger.py	94.88% <100.00%> (+0.12%)	⬆️
synapse/tests/utils.py	94.00% <0.00%> (-2.05%)	⬇️
synapse/lib/hiveauth.py	96.22% <0.00%> (-0.72%)	⬇️
... and 4 more

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[Cisphyx]

Might be good to add an async column to the trigger.list command output