DM-38622: Replace deprecated make_source_mask function

[coveralls]

Pull Request Test Coverage Report for Build 4658510082

• 18 of 20 (90.0%) changed or added relevant lines in 2 files are covered.
• 405 unchanged lines in 8 files lost coverage.
• Overall coverage decreased (-4.8%) to 84.222%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
spectractor/extractor/background.py	9	10	90.0%
spectractor/tools.py	9	10	90.0%
<!--	Total:	18	20	90.0%	-->

Files with Coverage Reduction	New Missed Lines	%
spectractor/extractor/extractor.py	1	86.03%
spectractor/extractor/spectroscopy.py	1	98.74%
spectractor/fit/fitter.py	15	88.45%
spectractor/fit/fit_spectrum.py	39	72.67%
spectractor/fit/fit_multispectra.py	59	59.92%
spectractor/fit/fit_spectrogram.py	67	74.75%
spectractor/simulation/image_simulation.py	89	50.36%
spectractor/simulation/simulator.py	134	55.61%
<!--	Total:	405		-->

Totals
Change from base Build 4366033606:	-4.8%
Covered Lines:	6902
Relevant Lines:	8195

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💛 - Coveralls