avoid unneccessary geometry building during count/ratio requests

[tyrasd]

Description

Improve performance of count queries by skipping calling getGeometry in the count code paths. This eliminates the (sometimes expensive) construction of JTS geometries in cases where it is not actually needed.

Todo

• perform some simple benchmarks to see how big of a difference this makes

Checklist

• My code follows the code-style rules, and I have checked on the static analyses
• I have commented my code
• I have written javadoc (required for public methods)
• I have added sufficient unit and API tests
• I have made corresponding changes to the documentation
• I have updated the CHANGELOG.md
• I have adjusted the examples in the check-ohsome-api script or created an issue in the corresponding repository. More Information here.

[tyrasd]

perform some simple benchmarks to see how big of a difference this makes

benchmark query: /elements/count/ratio?bboxes=8.61,48.02,11.87,51.66&filter2=type:way%20and%20building=yes&filter=type:way&format=json&time=2010-01-01%2F2020-01-01%2FP1M

master	this branch
2 min 10 sec	1 min 55 sec

[joker234]

looks pretty good 👍 Just some minor remarks/questions.