Migrate Storybook 6 builder packages to the Storybook 7 frameworks

Storybook 7 replaces a renderer plus @storybook/builder-webpack5 or @storybook/builder-vite with one framework package. Renames the builder dependency to @storybook/<renderer>-webpack5 or @storybook/<renderer>-vite when the renderer (react, vue3, html, web-components, preact, svelte) is declared and its framework is not, and removes @storybook/manager-webpack5, @storybook/manager-webpack4 and @storybook/builder-webpack4, which no longer exist. The renamed dependency gets the version 7.x, which the dependency upgrade then moves on to the target major.