sandbox: Bind mount on top of symlink if possible #9962

Job	Run time
unit-test	1m 18s
integration-test (arch, arch)	27m 33s
integration-test (arch, fedora)	28m 41s
integration-test (azure, arch)	15m 44s
integration-test (arch, debian)	27m 53s
integration-test (azure, debian)	15m 26s
integration-test (azure, fedora)	16m 31s
integration-test (azure, opensuse)	16m 36s
integration-test (azure, ubuntu)	15m 32s
integration-test (centos, arch)	20m 52s
integration-test (centos, debian)	22m 52s
integration-test (centos, fedora)	29m 23s
integration-test (centos, opensuse)	26m 16s
integration-test (centos, ubuntu)	23m 17s
integration-test (debian, arch)	22m 37s
integration-test (debian, debian)	22m 34s
integration-test (debian, fedora)	23m 36s
integration-test (fedora, arch)	23m 19s
integration-test (fedora, debian)	24m 41s
integration-test (fedora, fedora)	26m 38s
integration-test (fedora, opensuse)	25m 34s
integration-test (debian, ubuntu)	22m 7s
integration-test (fedora, ubuntu)	24m 27s
integration-test (opensuse, arch)	13m 45s
integration-test (opensuse, debian)	22m 21s
integration-test (opensuse, fedora)	22m 6s
integration-test (opensuse, opensuse)	22m 15s
integration-test (opensuse, ubuntu)	24m 14s
integration-test (ubuntu, arch)	22m 49s
integration-test (ubuntu, debian)	23m 21s
integration-test (ubuntu, fedora)	24m 17s
integration-test (ubuntu, ubuntu)	22m 35s
	11h 41m 10s

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