Silence additional weight warnings

[teunbrand]

This PR aims to fix #5263.

It continuous the saga of silencing dropped weight warnings, like #5071 and #5218 before it.

I also found geom_dotplot() to use a weight aesthetic, but it reports it doesn't and throws a warning about dropped weights when present. I fixed this by promoting it to a visible aesthetic and silencing the warning. In the example below, only the bin width warnings persist.

library(ggplot2)

p <- ggplot(mtcars, aes(x = mpg))
p1 <- p + geom_dotplot(aes(weight = cyl))
#> Warning in geom_dotplot(aes(weight = cyl)): Ignoring unknown aesthetics: weight
p2 <- p + geom_dotplot()
patchwork::wrap_plots(p1, p2)
#> Bin width defaults to 1/30 of the range of the data. Pick better value with
#> `binwidth`.
#> Warning: The following aesthetics were dropped during statistical transformation: weight
#> ℹ This can happen when ggplot fails to infer the correct grouping structure in
#>   the data.
#> ℹ Did you forget to specify a `group` aesthetic or to convert a numerical
#>   variable into a factor?
#> Bin width defaults to 1/30 of the range of the data. Pick better value with
#> `binwidth`.

^{Created on 2023-04-12 with reprex v2.0.2}

[thomasp85]

LGTM