chore(windows): Fix tests CS stop reliability

Recently, the test test_truncate_retry has been observed to fail on
the Windows client CI due to chunkserver stop operations not taking
effect immediately. This delay causes the test to become flaky. To
mitigate the issue, a short sleep has been added after stopping the
chunkserver to ensure that the stop command and its subsequent
operations have fully taken effect before the test proceeds.

Additionally, the test test_ec_read_combinations was flaky because
insufficient time was given for the file-generate utility to write
all file chunk parts. This timing issue also caused intermittent
failures on the Windows client CI.

Co-authored-by: Dave <dave@leil.io>

Signed-off-by: rolysr <rolysr@leil.io>

Author: rolysr

tests/test_suites/ShortSystemTests/test_ec_read_combinations.sh

@@ -11,6 +11,9 @@ dir="${info[mount0]}/dir"
 mkdir "$dir"
 saunafs setgoal ec "$dir"
 FILE_SIZE=876M file-generate "$dir/file"
+if is_windows_system; then
+	sleep 0.1
+fi
 
 for i in {0..7}; do
 	for cs in {0..2}; do

tests/test_suites/ShortSystemTests/test_truncate_retry.sh

@@ -13,13 +13,15 @@ FILE_SIZE=1234 file-generate file
 checksum123="$(head -c 123 file | md5sum)"
 
 saunafs_chunkserver_daemon 0 stop
+saunafs_wait_for_ready_chunkservers 0
 assert_awk_finds '/no valid copies/' "$(saunafs fileinfo file)"
 # Following operation should pass - wake up just after 4th try (0.2 + 0.4 + 0.8 + 1.6 = 3.0s)
 (sleep 3.1 && saunafs_chunkserver_daemon 0 start) & truncate -s 123 file
 assert_awk_finds '/[0-9A-F]+_00000002/' "$(saunafs fileinfo file)"
 assert_equals "$checksum123" "$(cat file | md5sum)"
 
 saunafs_chunkserver_daemon 0 stop
+saunafs_wait_for_ready_chunkservers 0
 assert_awk_finds '/no valid copies/' "$(saunafs fileinfo file)"
 # Following operation shouldn't pass - waiting time's exceeded
 sleep 12.7 && saunafs_chunkserver_daemon 0 start &