feat: run incremental package index update after each process-updates workflow

Each process-updates workflow now calls upload_package_index at the end to update the PACKAGES files for its platform/arch immediately after builds complete. The full update-package-index cron should be rescheduled to weekly.

.crow/process-updates-ubuntu-2404-arm64.yaml

@@ -55,5 +55,6 @@ steps:
       - mkdir -p /mnt/cache/pkgcache /mnt/cache/R-pkgs /mnt/cache/ccache /mnt/cache/packages
       # options(future.globals.onReference = NULL): for some reason s3fs::file_delete() throws 'Error: Detected a non-exportable reference ('externalptr') in one of the globals ('FUN' of class 'function') used in the future expression' otherwise
       - xvfb-run R -q -e "options(crayon.enabled = TRUE, Ncpus = 4, future.globals.onReference = 'error', repos = structure(c(getOption('repos'),INLA='https://inla.r-inla-download.org/R/stable'))); progressr::handlers('cli'); progressr::handlers(global = TRUE); options(future.globals.onReference = NULL); bincraft::process_cran_updates(interval = $INTERVAL, platform = 'ubuntu-2404', process_updated = TRUE, process_new = TRUE, process_removed = TRUE, 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'), metadata_db_host = 'r-binaries.devxy.io', metadata_db_name = 'build_metadata', metadata_db_table = 'single_builds', metadata_db_user = 'rpkgs', metadata_db_password = Sys.getenv('PGPASS'), metadata_db_sslmode = 'require', metadata_db_port = 15432, archive = TRUE, upload = TRUE, store_build_metadata = TRUE)"
+      - R -q -e 'library(bincraft); upload_package_index(codename = "noble", 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"))'