Fix/issue 1410 repair dissolve

[barendgehrels]

This PR:

• fixes compilation
• removes some calls which should now not be necessary anymore
• fixes the unit test (and adding geojson)

It is a good preparing step - but it is not yet how it was at 1.85

The algorithm needs to be adapted to the new Graph algorithm - because it now finds some isolated components, which should be connected for dissolve.

[tinko92]

The changes look good to me (make all calls consistent with the removal of rescale policies, replace svg mapper with geojson in testing). I noticed no new failures in the main test suite, as expected based on the changes.

Two things I noticed, though:

1. line 13, run dissolve.cpp is still commented out in geometry/extensions/test/algorithms/Jamfile in your branch. If I run that test, I get 63 failures on my only tested configuration linux, aarch64 with gcc (7, 8, 9, 12, 13, star_{a, b, c}, mail_2017_09_24_{e,f}, mail_2017_09_30_a, reallife, gitter_2013_04_b, ggl_list_denis, mail_2018_08_19 all with types f and d). That does confirm that it compiles, though.
2. The compilation issues of dissolve would have been caught by a minimal test. Would we want such a test as part of the CI for extensions which are intended for future inclusion and active usage?