sar command is unable to read the sa file from a new path.

Issue

• The sar command is unable to read the sa[0-9] file from a new path /var/ephemeral/sa.

# cat /etc/sysconfig/sysstat |grep SA_DIR=
#SA_DIR=/var/log/sa
SA_DIR=/var/ephemeral/sa

# ls -l  /var/ephemeral/sa
total 1484644
-rw-r--r-- 1 root root 18947536 Mar  1 23:58 sa01
-rw-r--r-- 1 root root 19069532 Mar  2 23:58 sa02
-rw-r--r-- 1 root root 19069532 Mar  3 23:58 sa03
-rw-r--r-- 1 root root 19069532 Mar  4 23:58 sa04
-rw-r--r-- 1 root root 19069532 Mar  5 23:58 sa05
-rw-r--r-- 1 root root 19069532 Mar  6 23:58 sa06
-rw-r--r-- 1 root root 19069532 Mar  7 23:58 sa07
-rw-r--r-- 1 root root 19069532 Mar  8 23:58 sa08
-rw-r--r-- 1 root root 19069532 Mar  9 23:58 sa09
-rw-r--r-- 1 root root 18275012 Mar 10 23:58 sa10

# sar -u
Linux 4.18.0-425.19.2.el8_7.x86_64 (TEST)   **10/24/2023**      _x86_64_        (192 CPU)

12:00:00 AM     CPU     %user     %nice   %system   %iowait    %steal     %idle
12:10:00 AM     all      1.00      0.00      0.66      0.03      0.00     98.30
12:20:00 AM     all      0.99      0.00      0.66      0.03      0.00     98.32
12:30:00 AM     all      1.02      0.00      0.68      0.03      0.00     98.28
12:40:00 AM     all      1.04      0.00      0.76      0.03      0.00     98.17

• The sar -u command still extracts data from the default path, which is /var/log/sa.

# strace -fvttTyy -s 256 -o /tmp/strace.txt sar -u

# grep "read" /tmp/strace.txt | awk '{print $3}' | sort | uniq -c
      1 execve("/usr/bin/sar",
      2 read(3</usr/lib64/libc-2.28.so>,
      2 read(3</usr/share/zoneinfo/Asia/Kolkata>,
   1529 read(3</var/log/sa/sa10>,                            <<< - - - 
      2 read(4</usr/share/locale/locale.alias>,