Merge branch 'issue/check_geometry_tolerances' into 'master'

ref:core/dune-geometry

### Summary

Replaces fixed tolerances 1.e-8 with ctype dependent tolerance

### Details

Tests with geometries using float as ctype may fail to reach the desired fixed
tolerance 1.e-8. This is corrected by using the
tolerance=sqrt(numeric_limits<ctype>::epsilon()) value. This value gives
approximately

-   `tolerance<double> = 1.5e-8` and
-   `tolerance<float> = 3.5e-4`

and thus previous test runs with ctype=double should also pass the test with
this change.

See merge request [!126]

  [!126]: gitlab.dune-project.org/core/dune-geometry/merge_requests/126