change context variables during runtime via `SetVariableTask` #581

Job	Run time
documentation / script inventory	5s
e2e tests local	6m 59s
linting	1m 2s
test-and-coverage / ubuntu-latest / python-3.8	1m 11s
e2e tests dist	19m 44s
test-and-coverage / ubuntu-latest / python-3.9	1m 15s
test-and-coverage / ubuntu-latest / python-3.10	1m 15s
test-and-coverage / ubuntu-latest / python-3.11	1m 14s
test-and-coverage / windows-latest / python-3.11	2m 51s
documentation / script/docs-generate-changelog.py	29s
documentation / script/docs-generate-licenses.py	30s
documentation / script/docs-generate.bash	51s
documentation / build	2m 53s
releasable	6s
	40m 25s

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