Replace vega-lib with taucharts

[ChristianLieven]

• [x] fix #563, #627

• [x] add an entry to the next release

• Replace vega with taucharts in all reports.

• Fix plots to be large enough.

• Fix responsive behaviour.

• Add clear axis labels and understandable titles.

• Add an option to save all plots to png, json and csv.

• Color code the category plots just like the results buttons on the snapshot report.

• Fix the data that is displayed in the independent an specific sections of the history report.

• Invert metrices and display as percentages.

• Add hover-over tooltips for all plots.

• Implement lazy loading for all the reports, meaning that the content of an expansion panel in any of the reports is only rendered when it is open.

[codecov[bot]]

Codecov Report

Merging #644 into develop will decrease coverage by 0.04%. The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop     #644      +/-   ##
===========================================
- Coverage    85.07%   85.02%   -0.05%     
===========================================
  Files           59       59              
  Lines         3243     3246       +3     
  Branches       436      436              
===========================================
+ Hits          2759     2760       +1     
- Misses         397      398       +1     
- Partials        87       88       +1

Impacted Files	Coverage Δ
memote/support/basic.py	92.04% <0%> (-1.06%)	:arrow_down:
memote/suite/reporting/history.py	98.03% <0%> (+0.03%)	:arrow_up:

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