Remove deprecated manager-api methods

[yannbf]

Locations:

getPanels:

storybook/code/lib/manager-api/src/modules/addons.ts

Line 39 in 78bcb62

* @deprecated please use getElements('panel') instead. This API will be removed in storybook 8.0.

getStoryPanels:

storybook/code/lib/manager-api/src/modules/addons.ts

Line 46 in 78bcb62

* @deprecated please use getElements('panel') instead, and do the filtering manually. This API will be removed in storybook 8.0.

getAddonState

storybook/code/lib/manager-api/src/modules/addons.ts

Line 79 in 78bcb62

* @deprecated This API might get dropped, if you are using this, please file an issue.

setAddonState

storybook/code/lib/manager-api/src/modules/addons.ts

Line 67 in 78bcb62

* @deprecated This API might get dropped, if you are using this, please file an issue.

isToolShown

Type API_Panels

storybook/code/lib/types/src/modules/api.ts

Line 43 in 7cffefc

* @deprecated This interface will be removed in 8.0

Type API_Collection

storybook/code/lib/types/src/modules/api.ts

Line 38 in 7cffefc

* @deprecated this is synonymous with `Addon_Collection`. This interface will be removed in 8.0

Type API_Addon

storybook/code/lib/types/src/modules/api.ts

Line 33 in 7cffefc

* @deprecated this is synonymous with `Addon_Type`. This interface will be removed in 8.0

Type isToolShown (seems like its runtime functionality was already removed)

storybook/code/lib/types/src/modules/api.ts

Line 110 in 7cffefc