Add HeatPumpStrategyWithoutTanks to is_heatpump_node_type utility method

[hannesdiedrich]

Reason for the proposed changes

Please describe what we want to achieve and why.

Proposed changes

GSY_WEB_BRANCH=master

[spyrostz]

LGTM

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 67.60%. Comparing base (84ce89b) to head (574835b).
⚠️ Report is 3 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #613   +/-   ##
=======================================
  Coverage   67.60%   67.60%           
=======================================
  Files          88       88           
  Lines        5569     5569           
  Branches     1262     1262           
=======================================
  Hits         3765     3765           
  Misses       1622     1622           
  Partials      182      182           

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