refactor: migrate to backblaze

.crow/update-package-index-redhat-9-arm64.yaml

@@ -15,10 +15,10 @@ steps:
     environment:
       RED_HAT_DEV_PW:
         from_secret: RED_HAT_DEV_PW
-      HETZNER_S3_ACCESS_KEY_K3S:
-        from_secret: HETZNER_S3_ACCESS_KEY_K3S
-      HETZNER_S3_SECRET_KEY_K3S:
-        from_secret: HETZNER_S3_SECRET_KEY_K3S
+      B2_S3_ACCESS_KEY:
+        from_secret: B2_S3_ACCESS_KEY
+      B2_S3_SECRET_KEY:
+        from_secret: B2_S3_SECRET_KEY
       PGPASS:
         from_secret: PGPASS
       REPO_RO_TOKEN:
@@ -45,7 +45,7 @@ steps:
       - R -q -e 'pak::pak("pat-s/desc@description-from-remote")'
       - R -q -e 'packageVersion("bincraft")'
       - cd /mnt/cache/packages
-      - R -q -e 'options(crayon.enabled = TRUE); library(bincraft); future::plan("multisession", workers = 4); library(progressr); handlers(global = TRUE); handlers("progress"); upload_package_index(codename = "rhel9", s3_endpoint = "https://hel1.your-objectstorage.com", s3_region = "hel1", s3_bucket = "devxy-r-package-binaries-hel1", s3_access_key_id = Sys.getenv("HETZNER_S3_ACCESS_KEY_K3S"), s3_secret_access_key = Sys.getenv("HETZNER_S3_SECRET_KEY_K3S"))'
+      - R -q -e 'options(crayon.enabled = TRUE); library(bincraft); future::plan("multisession", workers = 4); library(progressr); handlers(global = TRUE); handlers("progress"); upload_package_index(codename = "rhel9", s3_endpoint = "https://s3.eu-central-003.backblazeb2.com", s3_region = "eu-central-003", s3_bucket = "devxy-rpkgs-binaries", s3_access_key_id = Sys.getenv("B2_S3_ACCESS_KEY"), s3_secret_access_key = Sys.getenv("B2_S3_SECRET_KEY"))'
     backend_options:
       kubernetes:
         resources: