Rename VORLAUFTEMP, SAMMLERISTTEMP etc. to better reflect the heatpump menu

[kr0ner]

[github-actions]

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[github-actions]

Hi there! This is an automated message to let you know that this issue has been inactive for some time. If no further activity or updates are provided in the next 7 days, this issue will be closed as stale. If you're still working on this issue, please leave a comment to let us know. Otherwise, feel free to reopen the issue if you encounter the problem again in the future. Thanks for your understanding!