[21364] Remove double // in some installation paths (backport #5111) #1180

Job	Run time
sanitizers-ci / asan_fastdds_build	5m 19s
sanitizers-ci / tsan_fastdds_test	2h 21m 36s
sanitizers-ci / asan_fastdds_test	5h 29m 42s
sanitizers-ci / asan_discovery_server_test	23m 32s
	8h 20m 9s

Provide feedback