Custom geoid support

[Withalion]

fixes #4237

By default the app uses EGM96 geoid model to recalculate the elevation. Sometimes there is a need for more precise model, which is local to some area. With the work done in MerginMaps/qgis-plugin#841 admins can setup custom geoid model. This PR changes the mobile app behaviour to use the custom model if it's setup and shows user the current model in use.

For local geoid models, if current position is outside the model area we should show N/A values for Altitude and Geoid Separation. The code for this behaviour might be missing in some providers, I'm waiting for dev/geoid-support be merged it will be implemented in dev/geoid-support

[github-actions]

Pull Request Test Coverage Report for Build 19823024385

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 341 unchanged lines in 5 files lost coverage.
• Overall coverage decreased (-0.05%) to 59.566%

---

Files with Coverage Reduction	New Missed Lines	%
mm/app/position/providers/bluetoothpositionprovider.cpp	5	77.36%
mm/app/position/providers/simulatedpositionprovider.cpp	7	86.73%
mm/app/position/providers/internalpositionprovider.cpp	34	20.66%
mm/app/position/positionkit.cpp	57	73.11%
mm/app/inpututils.cpp	238	52.94%

Totals
Change from base Build 19822206753:	-0.05%
Covered Lines:	8596
Relevant Lines:	14431

---

💛 - Coveralls

[tomasMizera]

Good job 🔝

[wonder-sk]

@Withalion shouldn't we set elevation and elevation_diff to NaN when positionOutsideGeoidModelArea = true ? It seems this is currently being done only in the simulated provider.

Also, what happens if a vertical grid is missing in transformPoint()? Ideally we should show an error message, as it is important that user knows there is an issue, and get it fixed ASAP, rather than quietly recording incorrect measurements...

[Withalion]

1. it's not visible here as the work for other providers was done in GNSS PR
2. I do believe we show it to the users let me check and if not then we log it at least