Aha user provisioning, telepath user resolution (SYN-4054, SYN-3953)

[vEpiphyte]

invert user lookup for the cell to prefer aha:network prefixed usernames over the given username.
only add aha users during provisioning if the user (by name) does not exist and does not have perms to register connections.
add aha test helpers for provisioning services.
fix call error in Base.waiter()
Drop aha support for aha provisioning across multiple aha networks.
fix typos in tools

[codecov]

Codecov Report

Base: 97.12% // Head: 97.02% // Decreases project coverage by -0.10% ⚠️

Coverage data is based on head (85c339c) compared to base (fb8417b).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2850      +/-   ##
==========================================
- Coverage   97.12%   97.02%   -0.11%     
==========================================
  Files         214      214              
  Lines       41562    41594      +32     
==========================================
- Hits        40367    40356      -11     
- Misses       1195     1238      +43     

Flag	Coverage Δ
linux	97.02% <100.00%> (-0.01%)	⬇️
linux_replay	?

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Impacted Files	Coverage Δ
synapse/tools/aha/enroll.py	94.23% <ø> (ø)
synapse/lib/aha.py	97.99% <100.00%> (+0.02%)	⬆️
synapse/lib/base.py	94.42% <100.00%> (+0.23%)	⬆️
synapse/lib/cell.py	97.75% <100.00%> (-0.01%)	⬇️
synapse/tests/utils.py	94.41% <100.00%> (-1.65%)	⬇️
synapse/cortex.py	96.71% <0.00%> (-0.55%)	⬇️
synapse/lib/hiveauth.py	95.71% <0.00%> (-0.52%)	⬇️
synapse/lib/trigger.py	94.98% <0.00%> (-0.39%)	⬇️
synapse/lib/view.py	96.98% <0.00%> (-0.34%)	⬇️
... and 14 more

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