[patch] :broom: be more consistent in caching/shortcuts

[liamhuber]

Instead of always defining private holders by hand

[github-actions[bot]]

:point_left: Launch a binder notebook on branch _pyiron/pyiron_workflow/consistentcaching

[codacy-production[bot]]

Coverage summary from Codacy

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Coverage variation	Diff coverage
:white_check_mark: +0.45% (target: -1.00%)	:white_check_mark: 94.47%

Coverage variation details

| | Coverable lines | Covered lines | Coverage | | ------------- | ------------- | ------------- | ------------- | | Common ancestor commit (37fd191ff8009793bd7bdaa10b020d9213d23468) | 3698 | 3269 | 88.40% | | | Head commit (697557898402dcfdbe60545f98e03aa80b20dd35) | 3756 (+58) | 3337 (+68) | 88.84% (**+0.45%**) | **Coverage variation** is the difference between the coverage for the head and common ancestor commits of the pull request branch: ` - `

Diff coverage details

| | Coverable lines | Covered lines | Diff coverage | | ------------- | ------------- | ------------- | ------------- | | Pull request (#307) | 217 | 205 | **94.47%** | **Diff coverage** is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: `/ * 100%`

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