Save hits level information(hits height and time difference) in peak and event level

[dachengx]

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This PR depends on AxFoundation/strax#716. The main plots are here.

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• Until the automated tests pass, please mark the PR as a draft.
• On the XENONnT fork we test with database access, on private forks there is no database access for security considerations.

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[coveralls]

Coverage: 93.469% (+0.05%) from 93.421% when pulling 185ae81 on hits_time_diff into ae2d3e0 on master.