fix: wrong terminal counts calculated during migration check #18400

Job	Run time
docker-ent-meta	4s
docker-oss-meta	3s
docker-sbsvc-meta	4s
docker-oss (self-hosted, Linux, ARM64, rudderlabs/develop-rudder-server:fix.migrationNumTerminalC...	5m 0s
docker-oss (ubuntu-latest, rudderlabs/develop-rudder-server:fix.migrationNumTerminalCounts-amd64,...	4m 20s
docker-suppression-backup-service (self-hosted, Linux, ARM64, rudderstack/develop-suppression-bac...	3m 56s
docker-suppression-backup-service (ubuntu-latest, rudderstack/develop-suppression-backup-service:...	2m 51s
docker-ent (self-hosted, Linux, ARM64, rudderstack/develop-rudder-server-enterprise:fix.migration...	3m 56s
docker-ent (ubuntu-latest, rudderstack/develop-rudder-server-enterprise:fix.migrationNumTerminalC...	4m 22s
create-manifest-docker-sbsvc	6s
create-manifest-docker-ent	7s
create-manifest-docker-oss	8s
	24m 57s

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