[All] Disable Drawtool functions using Vec4f

[fredroy]

#1626 generalized the use of RGBAColor instead of Vec4f to select a color.
And all the functions were deprecated (but still usable) until the v21.06.

For the upcoming release of v21.06, those functions have been deleted, but their definitions are still there, to inform the user how to fix the compilation error.

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[fredroy]

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[fredroy]

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[fredroy]

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