Replace hacky version of `calculate_max_depth` with simpler one. #6271

Job	Run time
Discover Versions	3s
Platform Cache / Discover Platforms	2s
Platform Cache / Build Platforms (none)	3s
Run Build Workflow / Build leap (reproducible)	8m 57s
Run Build Workflow / Build leap (asserton)	6m 19s
Run Build Workflow / Build leap (ubsan)	7m 49s
Run Build Workflow / Build leap (ubuntu22)	7m 13s
Run Build Workflow / Build leap (ubuntu20)	8m 41s
Build deb packages (ubuntu20)	9m 51s
Build deb packages (ubuntu22)	9m 10s
NP Tests (ubuntu20)	6m 38s
Tests (ubuntu20)	3m 14s
Build deb packages (reproducible)	8m 58s
NP Tests (ubuntu22)	5m 15s
LR Tests (ubuntu20)	24m 17s
Tests (ubuntu22)	3m 23s
LR Tests (ubuntu22)	24m 4s
NP Tests (asserton)	5m 8s
Tests (asserton)	3m 14s
LR Tests (asserton)	24m 2s
NP Tests (ubsan)	8m 11s
Tests (ubsan)	3m 46s
NP Tests (ubuntu20repro)	6m 12s
LR Tests (ubsan)	25m 21s
Tests (ubuntu20repro)	3m 24s
LR Tests (ubuntu20repro)	24m 13s
Tests (ubuntu22repro)	3m 25s
LR Tests (ubuntu22repro)	24m 0s
NP Tests (ubuntu22repro)	5m 6s
libtester tests (ubuntu22, build-tree)	9m 8s
libtester tests (ubuntu22, make-dev-install)	9m 7s
libtester tests (ubuntu22, deb-install)	4m 21s
All Required Tests Passed	1s
	4h 52m 36s

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