docs: add Multi Region Encryption samples #9978

Job	Run time
clirr	1m 16s
clirr	1m 16s
dependencies (17)	1m 19s
dependencies (17)	1m 19s
javadoc	2m 50s
javadoc	2m 50s
lint	1m 30s
lint	1m 30s
units (11)	3m 22s
units (11)	3m 22s
units (8)	3m 33s
units (8)	3m 33s
units (17)	3m 22s
units (17)	3m 22s
units-with-multiplexed-session (11)	4m 0s
units-with-multiplexed-session (11)	4m 0s
units (21)	3m 41s
units (21)	3m 41s
units-with-multiplexed-session (17)	3m 46s
units-with-multiplexed-session (17)	3m 46s
units-with-multiplexed-session (8)	3m 46s
units-with-multiplexed-session (8)	4m 3s
units-with-multiplexed-session (21)	3m 53s
units-with-multiplexed-session (21)	3m 53s
windows	6m 5s
windows	6m 5s
	1h 25m 3s

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