docs: clarify requirements for deleting volumes (#26240) #21048

Job	Run time
checks / checks	2m 27s
tests-api	3m 7s
compile (ubuntu-22.04)	4m 2s
compile (ubuntu-22.04-arm)	1m 29s
compile (macos-14)	2m 19s
compile (windows-2022)	8m 3s
tests-groups (nomad, linux_amd64 )	11m 56s
tests-groups (drivers, linux_arm64 )	7m 0s
tests-groups (client, linux_arm64 )	6m 21s
tests-groups (quick, linux_amd64 )	7m 12s
tests-groups (quick, linux_arm64 )	6m 46s
tests-groups (nomad, linux_arm64 )	12m 5s
tests-groups (command, linux_arm64 )	14m 20s
tests-groups (client, linux_amd64 )	8m 38s
tests-groups (drivers, linux_amd64 )	8m 28s
tests-groups (command, linux_amd64 )	13m 38s
handle-failure	-1s
	1h 57m 50s

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