Asm overlay path

[Pega88]

Similar to the fix @ameer00 and I made for KEY_FILE_COMMAND_SNIPPET to add the full path to the service account key file, the CUSTOM_OVERLAYS_COMMAND also needs the full path since the script generating the command is in a different location from where it is used, so it will not resolve relative paths correctly.

[comment-bot-dev]

Thanks for the PR! 🚀
✅ Lint checks have passed.

[bharathkkb]

Thanks for the PR
Looks like the converge step is failing
I believe this is due to CUSTOM_OVERLAYS_COMMAND becoming CUSTOM_OVERLAYS_COMMAND is --custom_overlay /workspace/test/fixtures/simple_zonal_with_asm/none although there are none specified

 install_asm_1.9 --verbose --project_id ci-gke-asm-... --cluster_name simple-zonal-asm-cluster-...--cluster_location us-central1-a --mode install  --option envoy-access-log --custom_overlay /workspace/test/fixtures/simple_zonal_with_asm/none --output_dir ./simple-zonal-asm-cluster-...-outdir  --enable_cluster_roles --enable_cluster_labels --enable_gcp_components    
       install_asm_1.9: [ERROR]: Couldn't find yaml file /workspace/test/fixtures/simple_zonal_with_asm/none.
       + cleanup
       + rm -rf /tmp/kubectl_wrapper_27218_27705

[Pega88]

@bharathkkb let me know if you need other changes, thnx!