Add CUDA 12.6.3 and bump manylinux to 2_28 (#420)

This is a follow up of a commit I forgot to push in the PR
#419

So I am taking the freedom to merge without approvals

- Add CUDA 12.6.3 to pypi_cache.cuda_versions list
- Bump target_manylinux from 2_17 to 2_28 in config and deploy default

The manylinux_2_28 tag targets glibc 2.28+ (RHEL 8 / Ubuntu 20.04+),
dropping support for older distributions. CUDA 12.6.3 is added to ensure
wheels are cached for this widely-used toolkit version.

Signed-off-by: Jean Schmidt <contato@jschmidt.me>

Author: jeanschmidt

osdc/clusters.yaml

@@ -77,6 +77,7 @@ defaults:
   alloy_chart_version: "1.6.2"
   pypi_cache:
     cuda_versions:
+      - "12.6.3"
       - "12.8.1"
       - "13.0.2"
     # NOTE: python_versions is not consumed by manifest generation yet.
@@ -93,7 +94,7 @@ defaults:
     target_architectures:
       - "x86_64"
       - "aarch64"
-    target_manylinux: "2_17"
+    target_manylinux: "2_28"
 
 clusters:
   arc-staging:

osdc/modules/pypi-cache/deploy.sh

@@ -33,7 +33,7 @@ NAMESPACE=$(uv run "$CFG" "$CLUSTER" pypi_cache.namespace pypi-cache)
 INSTANCE_TYPE=$(uv run "$CFG" "$CLUSTER" pypi_cache.instance_type "")
 TARGET_PYTHON=$(uv run "$CFG" "$CLUSTER" pypi_cache.python_versions "3.10,3.11,3.12" | tr -d "[]' ")
 TARGET_ARCH=$(uv run "$CFG" "$CLUSTER" pypi_cache.target_architectures "x86_64,aarch64" | tr -d "[]' ")
-TARGET_MANYLINUX=$(uv run "$CFG" "$CLUSTER" pypi_cache.target_manylinux "2_17")
+TARGET_MANYLINUX=$(uv run "$CFG" "$CLUSTER" pypi_cache.target_manylinux "2_28")
 LOG_MAX_AGE_DAYS=$(uv run "$CFG" "$CLUSTER" pypi_cache.log_max_age_days "30")
 BUCKET=$(uv run "$CFG" "$CLUSTER" state_bucket)
 STATE_REGION="us-west-2"