Merge branch '3511027-field-storage-for' into '2.0.x'

...Derivative/UIPatternsSourceFieldPropertySourceDeriver.php

...erns_field/src/Plugin/Field/FieldType/SourceValueItem.php

...ld/src/Plugin/Field/FieldWidget/SourceComponentWidget.php

...terns_field/src/Plugin/Field/FieldWidget/SourceWidget.php

...UiPatterns/Source/UIPatternsSourceFieldPropertySource.php

...atterns_field/tests/fixtures/tests.ui_patterns_source.yml

...Kernel/Source/UIPatternsSourceFieldPropertySourceTest.php

modules/ui_patterns_field/ui_patterns_field.info.yml

...rc/Plugin/Field/FieldFormatter/ComponentFormatterBase.php

...matters/src/Plugin/Field/FieldFormatter/FormatterBase.php

...tters/src/Plugin/Field/FieldFormatter/SourceFormatter.php

src/Element/ComponentForm.php

src/Element/ComponentPropForm.php

src/Element/ComponentPropsForm.php

src/Element/ComponentSlotsForm.php

src/Plugin/UiPatterns/Source/AttributesWidget.php

src/Plugin/UiPatterns/Source/FieldPropertySource.php

src/Plugin/UiPatterns/Source/ListTextareaWidget.php