applies the new conventions for imaging tools agreed at BioHackEU23 #175

Job	Run time
Setup cache and determine changed repositories (3.7)	55s
Check file sizes	4s
Lint tool-list (3.7)	38s
Lint R scripts (ubuntu-20.04, release)	1m 50s
Lint Python scripts (3.7)	16s
Test tools (0, 3.7)	4m 26s
Test tools (1, 3.7)	4m 27s
Test tools (2, 3.7)	4m 24s
Test tools (3, 3.7)	4m 27s
Combine chunked test results (3.7)	34s
Check workflow success	2s
Deploy	1s
Report deploy status	1s
	22m 5s

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