TEST/MINOR: Fix the set_uid e2e test to work both on Alpine and Debian

Author: oliwer

.aspell.yml

@@ -43,3 +43,4 @@ allowed:
   - libdns
   - txt
   - testname
+  - uid

e2e/tests/set_uid/test.bats

@@ -24,7 +24,7 @@ setup() {
   run dpa_docker_exec 'pkill -9 dataplaneapi'
   assert_success
 
-  run dpa_docker_exec 'adduser -u 1500 testuiduser'
+  run dpa_docker_exec 'adduser -u 1500 testuiduser || useradd -m -u 1500 testuiduser'
   #assert_success ignore error since we do not plan to insert password, user will be created
 
   run docker cp "${BATS_TEST_DIRNAME}/dataplaneapi.yaml" "${DOCKER_CONTAINER_NAME}:/home/testuiduser/dataplaneapi.yaml"