make agent fails with error AGENT_E2E_TEST_SCENARIO is missing

[SaravanaStorageNetwork]

Describe the bug
make agent fails if AGENT_E2E_TEST_SCENARIO variable is missing.

To Reproduce
make agent
Follow the README README.md

Additional context

+(./agent/01_agent_requirements.sh:12): main(): [[ -z '' ]]
+(./agent/01_agent_requirements.sh:13): main(): echo 'AGENT_E2E_TEST_SCENARIO is missing or empty. Did you forget to set the AGENT_E2E_TEST_SCENARIO env var in the config_<USER>.sh file? Supported values: COMPACT_IPV4, COMPACT_IPV6, HA_IPV4, HA_IPV6, SNO_IPV4, SNO_IPV6.'
AGENT_E2E_TEST_SCENARIO is missing or empty. Did you forget to set the AGENT_E2E_TEST_SCENARIO env var in the config_<USER>.sh file? Supported values: COMPACT_IPV4, COMPACT_IPV6, HA_IPV4, HA_IPV6, SNO_IPV4, SNO_IPV6.
+(./agent/01_agent_requirements.sh:14): main(): exit 1
make: *** [Makefile:13: agent_requirements] Error 1