Update imagewriter.py with tile and coordinate checks and corrections

[JoeySpronck]

As discussed with multiple people from our group the wrapped ASAP image writer sometimes exhibits unexaplainable behaviour that is very hard to debug. In this PR I intend to prevent some of the obvious mistakes to pass without errors. If possible I correct the tile. By doing this the writer becomes more robust and guides the user on what to fix, instead of ambiguously trying to keep the loop going without throwing warnings or errors.

I think the _crop_tile function and the _get_row_col function already partly do some of these checks, but neither throw errors or warnings, causign outputs that are incorrect and leaving users unaware of what went wrong. I left them in right now though, the new function takes care of possible errors.

I havent tested this yet but I would like to share this already so we can finalize it together.
@martvanrijthoven @daangeijs @carlijnlems @nfsuysal @leandervaneekelen @rolandnemeth000

[coveralls]

Pull Request Test Coverage Report for Build 10634488362

Details

• 15 of 25 (60.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.1%) to 72.561%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
wholeslidedata/interoperability/asap/imagewriter.py	15	25	60.0%

Totals
Change from base Build 10526088141:	-0.1%
Covered Lines:	2224
Relevant Lines:	3065

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💛 - Coveralls