refactor(V3): remove old V3 colors & rename a class

...rofile-job-selection/profile-job-selection.component.html

...nt/structure-digital-helping-accompaniment.component.html

...ture-public-target/structure-public-target.component.html

...ity-material/structure-solidarity-material.component.html

...ills/base-skills-choice/base-skills-choice.component.html

...ment-access-choice/equipment-access-choice.component.html

...-buy/equipment-buy-type/equipment-buy-type.component.html

...march/online-demarch-common/online-demarch.component.html

src/app/profile/edit/edit.component.html

src/app/profile/edit/edit.component.scss

.../accompaniment-picker/accompaniment-picker.component.html

src/app/shared/components/button/button.component.scss

...tructure-type-picker/structure-type-picker.component.html

src/app/shared/components/tag-item/tag-item.stories.ts

.../training-type-picker/training-type-picker.component.html

src/assets/scss/_buttons.scss

src/assets/scss/_color.scss