installer.sh script to use `cdn_url` from the response to download the file

[lobkovilya]

Description

installer.sh script has a logic to construct URL, while apparently the url we need is already returned in cdn_url field.

Example response from api.cloudsmith.io

```json { "self_url": "https://api.cloudsmith.io/v1/packages/kong/kuma-binaries-preview/VxGAi7uDsVcQ/", "stage": 9, "stage_str": "Fully Synchronised", "stage_updated_at": "2024-05-20T20:26:09.302419Z", "status": 4, "status_reason": null, "status_str": "Completed", "status_updated_at": "2024-05-20T20:26:09.297853Z", "is_sync_awaiting": false, "is_sync_completed": true, "is_sync_failed": false, "is_sync_in_flight": false, "is_sync_in_progress": false, "is_cancellable": false, "is_copyable": true, "is_deleteable": true, "is_downloadable": true, "is_moveable": true, "is_quarantinable": true, "is_quarantined": false, "is_resyncable": true, "is_security_scannable": false, "sync_finished_at": "2024-05-20T20:26:09.302409Z", "sync_progress": 100, "architectures": [], "checksum_md5": "2749ba2befb544d7eb2698bff259867a", "checksum_sha1": "4f76a1d652e4f2422519ebf75084b58664c98ca2", "checksum_sha256": "7548736ed927a120ec92a5d050d74783ff0352995c67e94438d5e9df6ce8ec46", "checksum_sha512": "81e812ddc2437f7b17dc075e88e9b5945531dc3b5ca42bd52f3474a47e783f23d528ead4209a0b52c8e4c0840a57810a0418e97a003222a8401dc60bfed6fa09", "dependencies_checksum_md5": null, "dependencies_url": "https://api.cloudsmith.io/v1/packages/kong/kuma-binaries-preview/VxGAi7uDsVcQ/dependencies/", "description": null, "display_name": "kuma-linux-amd64", "distro": null, "distro_version": null, "downloads": 0, "cdn_url": "https://packages.konghq.com/public/kuma-binaries-preview/raw/names/kuma-linux-amd64/versions/2eff9a513/kuma-0.0.0-preview.v2eff9a513-linux-amd64.tar.gz", "epoch": null, "extension": ".gz", "filename": "kuma-0.0.0-preview.v2eff9a513-linux-amd64.tar.gz", "files": [ { "checksum_md5": "2749ba2befb544d7eb2698bff259867a", "checksum_sha1": "4f76a1d652e4f2422519ebf75084b58664c98ca2", "checksum_sha256": "7548736ed927a120ec92a5d050d74783ff0352995c67e94438d5e9df6ce8ec46", "checksum_sha512": "81e812ddc2437f7b17dc075e88e9b5945531dc3b5ca42bd52f3474a47e783f23d528ead4209a0b52c8e4c0840a57810a0418e97a003222a8401dc60bfed6fa09", "cdn_url": "https://packages.konghq.com/public/kuma-binaries-preview/raw/names/kuma-linux-amd64/versions/2eff9a513/kuma-0.0.0-preview.v2eff9a513-linux-amd64.tar.gz", "downloads": 0, "filename": "kuma-0.0.0-preview.v2eff9a513-linux-amd64.tar.gz", "is_downloadable": true, "is_primary": true, "is_synchronised": true, "signature_url": "https://packages.konghq.com/public/kuma-binaries-preview/VxGAi7uDsVcQ/gpg.dRgIn3iV9Hwk.asc", "size": 108976378, "slug_perm": "dRgIn3iV9Hwk", "tag": "pkg" } ], "format": "raw", "format_url": "https://api.cloudsmith.io/v1/formats/raw/", "identifier_perm": "VxGAi7uDsVcQ", "indexed": true, "license": null, "name": "kuma-linux-amd64", "namespace": "kong", "namespace_url": "https://api.cloudsmith.io/v1/namespaces/kong/", "num_files": 13, "package_type": 1, "release": null, "repository": "kuma-binaries-preview", "repository_url": "https://api.cloudsmith.io/v1/repos/kong/kuma-binaries-preview/", "security_scan_status": "Awaiting Security Scan", "security_scan_status_updated_at": null, "security_scan_started_at": null, "security_scan_completed_at": null, "self_html_url": "https://cloudsmith.io/~kong/repos/kuma-binaries-preview/packages/detail/raw/kuma-linux-amd64/2eff9a513/", "status_url": "https://api.cloudsmith.io/v1/packages/kong/kuma-binaries-preview/VxGAi7uDsVcQ/status/", "signature_url": "https://packages.konghq.com/public/kuma-binaries-preview/VxGAi7uDsVcQ/gpg.dRgIn3iV9Hwk.asc", "size": 108976378, "slug": "kuma-000-previewv2eff9a513-linux-amd64targz-0r1q", "slug_perm": "VxGAi7uDsVcQ", "subtype": "file", "summary": null, "tags": { "info": [ "amd64", "linux" ] }, "tags_immutable": { }, "type_display": "file", "uploaded_at": "2024-05-20T20:25:58.409387Z", "uploader": "kuma-github-actions", "uploader_url": "https://api.cloudsmith.io/v1/users/profile/kuma-github-actions/", "version": "2eff9a513", "version_orig": "2eff9a513", "vulnerability_scan_results_url": "https://api.cloudsmith.io/v1/vulnerabilities/kong/kuma-binaries-preview/VxGAi7uDsVcQ/" } ```