Update downloader to read allow lists from configs

[ntascii]

Summary

Updated download to read allow list configs from /etc/deploy/deployagent.conf.
Added a bazel target for downloader
Updated tests

Test plan

UTs

bazel test tests/test_http_download_helper
bazel test tests/test_s3_download_helper

test downloader, empty config

sudo bazel build deployd:deploy-downloader 
sudo bazel-bin/deployd/deploy-downloader -f /etc/deployagent.conf -v 2bhd_k2QT5GjAx0aR0G2mA_aa874a6 -u https://deployrepo.pinadmin.com/deploy-agent-pex/deploy-agent-pex-aa874a6.tar.gz -e deploy-init
2024-03-01 23:38:00,945:INFO: Start to download from url https://deployrepo.pinadmin.com/deploy-agent-pex/deploy-agent-pex-aa874a6.tar.gz to /mnt/builds/deploy-init-2bhd_k2QT5GjAx0aR0G2mA_aa874a6.tar.gz
2024-03-01 23:38:00,946:INFO: Running command: curl -o /mnt/builds/deploy-init-2bhd_k2QT5GjAx0aR0G2mA_aa874a6.tar.gz -fksS https://deployrepo.pinadmin.com/deploy-agent-pex/deploy-agent-pex-aa874a6.tar.gz
2024-03-01 23:38:01,073:INFO: Finish downloading: https://deployrepo.pinadmin.com/deploy-agent-pex/deploy-agent-pex-aa874a6.tar.gz to /mnt/builds/deploy-init-2bhd_k2QT5GjAx0aR0G2mA_aa874a6.tar.gz
2024-03-01 23:38:01,077:DEBUG: Starting new HTTPS connection (1): deployrepo.pinadmin.com:443
2024-03-01 23:38:01,107:DEBUG: https://deployrepo.pinadmin.com:443 "GET /deploy-agent-pex/deploy-agent-pex-aa874a6.tar.gz.sha1 HTTP/1.1" 404 324
2024-03-01 23:38:01,107:WARNING: Skip checksum verification. Invalid response from https://deployrepo.pinadmin.com/deploy-agent-pex/deploy-agent-pex-aa874a6.tar.gz.sha1
2024-03-01 23:38:01,108:INFO: untar files to /mnt/builds/2bhd_k2QT5GjAx0aR0G2mA_aa874a6
2024-03-01 23:38:01,317:INFO: Successfully extracted /mnt/builds/deploy-init-2bhd_k2QT5GjAx0aR0G2mA_aa874a6.tar.gz to /mnt/builds/2bhd_k2QT5GjAx0aR0G2mA_aa874a6
2024-03-01 23:38:01,317:INFO: Download succeeded.

Test downloader, mocking config

2024-03-01 23:39:16,374:INFO: Start to download from url https://deployrepo.pinadmin.com/deploy-agent-pex/deploy-agent-pex-aa874a6.tar.gz to /mnt/builds/deploy-init-2bhd_k2QT5GjAx0aR0G2mA_aa874a6.tar.gz
2024-03-01 23:39:16,374:ERROR: deployrepo.pinadmin.com is not in the allow list: ['test.com'].
2024-03-01 23:39:16,374:ERROR: Invalid url: https://deployrepo.pinadmin.com/deploy-agent-pex/deploy-agent-pex-aa874a6.tar.gz. Skip downloading.
2024-03-01 23:39:16,374:ERROR: Download failed.