feat: De-duplicate client console messages (#4177) #2734

Job	Run time
website / pkgdown	3m 5s
routine / routine	4m 35s
R-CMD-check / setup	1m 4s
R-CMD-check / macOS-latest (4.4.2)	2m 56s
R-CMD-check / windows-latest (4.4.2)	4m 20s
R-CMD-check / ubuntu-latest (devel)	3m 25s
R-CMD-check / ubuntu-latest (4.4.2)	3m 26s
R-CMD-check / ubuntu-latest (4.3.3)	4m 2s
R-CMD-check / ubuntu-latest (4.2.3)	3m 31s
R-CMD-check / ubuntu-latest (4.1.3)	3m 35s
R-CMD-check / ubuntu-latest (4.0.5)	3m 23s
	37m 22s

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