Fetch goal state when creating HostPluginProtocol

[narrieta]

Now we fetch the goal state explicitly instead of relying on somebody else initializing the instance in WireClient.

Also, the GoalState instance in WireClient will be removed as part of the next round of refactoring of the Protocol interface.

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This change is 

[codecov]

Codecov Report

Merging #1799 into develop will decrease coverage by 0.39%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #1799      +/-   ##
===========================================
- Coverage    68.88%   68.49%   -0.40%     
===========================================
  Files           81       82       +1     
  Lines        11374    11734     +360     
  Branches      1603     1644      +41     
===========================================
+ Hits          7835     8037     +202     
- Misses        3207     3349     +142     
- Partials       332      348      +16     

Impacted Files	Coverage Δ
azurelinuxagent/common/protocol/wire.py	70.52% <0.00%> (-1.35%)	⬇️
azurelinuxagent/common/protocol/hostplugin.py	83.60% <0.00%> (-0.55%)	⬇️
azurelinuxagent/common/protocol/metadata.py	53.31% <0.00%> (ø)
azurelinuxagent/common/utils/restutil.py	91.47% <0.00%> (+0.38%)	⬆️
azurelinuxagent/common/protocol/restapi.py	87.42% <0.00%> (+0.59%)	⬆️
azurelinuxagent/common/protocol/goal_state.py	94.13% <0.00%> (ø)
azurelinuxagent/common/utils/cryptutil.py	50.00% <0.00%> (+1.92%)	⬆️
azurelinuxagent/common/protocol/util.py	83.41% <0.00%> (+3.64%)	⬆️

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