Revert "increase memory.max in cgroups.bats"

This reverts commit 65a1074.

We needed [1] because when we removed the bindfd logic in [2] we had not
yet moved the binary cloning logic to Go and thus it was necessary to
increase the memory limit in CI because the clone was happening after
joining the cgroup. However, [3] finally moved that code to Go and thus
the cloning is now done outside of the container's cgroup and thus is no
longer accounted as part of the container's memory usage at any point.

Now we can properly support running a simple container with lower memory
usage as we did before.

[1]: commit 65a1074 ("increase memory.max in cgroups.bats")
[2]: commit b999376 ("nsenter: cloned_binary: remove bindfd logic entirely")
[3]: commit 0e9a335 ("nsexec: migrate memfd /proc/self/exe logic to Go code")

Signed-off-by: lfbzhm <lifubang@acmcoder.com>
[cyphar: fixed commit messages]
Signed-off-by: Aleksa Sarai <cyphar@cyphar.com>

tests/integration/cgroups.bats

@@ -303,7 +303,7 @@ convert_hugetlb_size() {
 				"memory.min":   "131072",
 				"memory.low":   "524288",
 				"memory.high": "5242880",
-				"memory.max": "20484096",
+				"memory.max": "10485760",
 				"pids.max": "99",
 				"cpu.max": "10000 100000",
 				"cpu.weight": "42"
@@ -319,14 +319,14 @@ convert_hugetlb_size() {
 	echo "$output" | grep -q '^memory.min:131072$'
 	echo "$output" | grep -q '^memory.low:524288$'
 	echo "$output" | grep -q '^memory.high:5242880$'
-	echo "$output" | grep -q '^memory.max:20484096$'
+	echo "$output" | grep -q '^memory.max:10485760$'
 	echo "$output" | grep -q '^pids.max:99$'
 	echo "$output" | grep -q '^cpu.max:10000 100000$'
 
 	check_systemd_value "MemoryMin" 131072
 	check_systemd_value "MemoryLow" 524288
 	check_systemd_value "MemoryHigh" 5242880
-	check_systemd_value "MemoryMax" 20484096
+	check_systemd_value "MemoryMax" 10485760
 	check_systemd_value "TasksMax" 99
 	check_cpu_quota 10000 100000 "100ms"
 	check_cpu_weight 42
@@ -368,7 +368,7 @@ convert_hugetlb_size() {
 			}
 			| .linux.resources.unified |= {
 				"memory.min": "131072",
-				"memory.max": "40484864",
+				"memory.max": "10485760",
 				"pids.max": "42",
 				"cpu.max": "5000 50000",
 				"cpu.weight": "42"
@@ -383,7 +383,7 @@ convert_hugetlb_size() {
 
 	runc exec test_cgroups_unified cat /sys/fs/cgroup/memory.max
 	[ "$status" -eq 0 ]
-	[ "$output" = '40484864' ]
+	[ "$output" = '10485760' ]
 
 	runc exec test_cgroups_unified cat /sys/fs/cgroup/pids.max
 	[ "$status" -eq 0 ]