Fix typehints and remove type ignores for ctl.importer & ctl.exporter

[ogenstad]

This change also highlighted an issue as we were still running aiorun to get the client.

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 2 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
infrahub_sdk/ctl/exporter.py	50.00%	1 Missing ⚠️
infrahub_sdk/ctl/importer.py	50.00%	1 Missing ⚠️

@@           Coverage Diff            @@
##           develop      #91   +/-   ##
========================================
  Coverage    64.26%   64.26%           
========================================
  Files           74       74           
  Lines         6858     6858           
  Branches      1356     1356           
========================================
  Hits          4407     4407           
  Misses        2099     2099           
  Partials       352      352           

Flag	Coverage Δ
python-3.10	43.21% <50.00%> (ø)
python-3.11	43.21% <50.00%> (ø)
python-3.12	43.21% <50.00%> (ø)
python-3.9	43.16% <50.00%> (ø)
python-filler-3.12	23.91% <0.00%> (ø)

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

Files with missing lines	Coverage Δ
infrahub_sdk/ctl/exporter.py	52.17% <50.00%> (ø)
infrahub_sdk/ctl/importer.py	55.00% <50.00%> (ø)