feat(grid): add styles for row spanned cells #5530

Job	Run time
CI \| Unit	1s
Status check > Unit	1s
CI \| Visual	1s
Lint scripts / run	56s
Lint styles / run (default)	1m 26s
Lint styles / run (bootstrap)	1m 29s
Compile themes / run	50s
Render test pages / verify	9s
Lint styles / run (material)	1m 31s
Lint styles / run (classic)	1m 33s
Lint styles / run (fluent)	1m 33s
Render test pages / run	2m 51s
Status check > Lint scripts	1s
Status check > Lint styles	1s
Status check > A11y / prepare	1s
Create screenshots / run (default)	2m 5s
Create screenshots / run (bootstrap)	2m 21s
Create screenshots / run (material)	2m 8s
Create screenshots / run (classic)	2m 18s
Create screenshots / run (fluent)	1m 59s
Status check > A11y / run-checks (1)	2m 46s
Status check > A11y / run-checks (2)	2m 38s
Status check > A11y / run-checks (3)	2m 32s
Status check > A11y / run-checks (4)	2m 35s
Detect changes	15s
Status check > Visual	1s
	34m 2s

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