All NAT44-ED 16M sessions CPS scale tests fail while setting NAT44 address range.

error: Failed to set NAT44 address range on host 10.30.51.44 (connections-per-second tests only)

symptom: VPP crash

test: 64B-avf-ethip4tcp-nat44ed-h262144-p63-s16515072-cps-ndrpdr 1c 2c 4c

        64B-avf-ethip4udp-nat44ed-h262144-p63-s16515072-cps-ndrpdr 1c 2c 4c

frequency: all

testbeds: 2n-skx, 2n-clx

examples:

    https://s3-logs.fd.io/vex-yul-rot-jenkins-1/csit-vpp-perf-report-coverage-2202-2n-skx/24/log.html.gz#s1-s1-s1-s1-s9

    https://s3-logs.fd.io/vex-yul-rot-jenkins-1/csit-vpp-perf-report-coverage-2202-2n-skx/25/log.html.gz#s1-s1-s1-s1-s9

    https://s3-logs.fd.io/vex-yul-rot-jenkins-1/csit-vpp-perf-report-coverage-2202-2n-clx/24/log.html.gz#s1-s1-s1-s1-s9

    https://s3-logs.fd.io/vex-yul-rot-jenkins-1/csit-vpp-perf-report-coverage-2202-2n-clx/25/log.html.gz#s1-s1-s1-s1-s9

https://s3-logs.fd.io/vex-yul-rot-jenkins-1/csit-vpp-perf-report-coverage-2206-2n-icx/7/log.html.gz#s1-s1-s1-s1-s13

https://s3-logs.fd.io/vex-yul-rot-jenkins-1/csit-vpp-perf-report-coverage-2210-2n-clx/9/log.html.gz#s1-s1-s1-s1-s11-t1

https://s3-logs.fd.io/vex-yul-rot-jenkins-1/csit-vpp-perf-report-coverage-2210-2n-icx/18/log.html.gz#s1-s1-s1-s1-s11-t3

notes: throughput tests in the same configuration and scale work fine