Implement, test GetSumDistance for systematics manager #1194

Job	Run time
Test Tidy Enforcement on macOS	8m 15s
Tests (clang++, test-native-regular)	27m 53s
Measure Test Coverage	32m 51s
Tests (clang++, test-native-fulldebug)	28m 14s
Build Docker Image	8m 29s
Tests (clang++, test-native-opt)	50m 59s
Tests (clang++, test-examples)	9m 18s
Web Tests	7m 12s
Tests (clang++, test-demos)	2m 39s
Enforce Tidyness	1m 29s
Tests (g++, test-native-regular)	36m 7s
Tests (g++, test-native-fulldebug)	36m 46s
Tests (g++, test-native-opt)	50m 50s
Tests (g++, test-examples)	9m 24s
Tests (g++, test-demos)	2m 39s
Test Documentation Build	12m 34s
Deploy Documentation Coverage	0s
Deploy to DockerHub and ghcr.io	0s
	5h 25m 39s

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