Bump all Pulp snapshots to latest versions in RL 8.x, RL 9.5

[priteau]

This updates to the final release for Rocky Linux 9.5.

[sjpb]

Extra build test: https://github.com/stackhpc/ansible-slurm-appliance/actions/runs/15708341185

[sjpb]

Cancelled above, had missed the fact the PR didn't include a fatimage change either, although that should be automatically triggered.

[sjpb]

Fat image build: https://github.com/stackhpc/ansible-slurm-appliance/actions/runs/15712063801

[sjpb]

Converted to draft to prevent merging until images updated, see link above.

[sjpb]

Confirmed using ansible/ci/update_timestamps.yml that there are no later upgrades to RL9.5 at least:

diff --git i/environments/common/inventory/group_vars/all/timestamps.yml w/environments/common/inventory/group_vars/all/timestamps.yml
index 971515d2..508d3c08 100644
--- i/environments/common/inventory/group_vars/all/timestamps.yml
+++ w/environments/common/inventory/group_vars/all/timestamps.yml
@@ -25,11 +25,11 @@ appliances_pulp_repos:
       timestamp: 20231104T015751
     '9':
       path: centos/9-stream/storage/x86_64/ceph-reef
-      timestamp: 20250514T025809
+      timestamp: 20250617T023108
   crb:
     '8.10':
       path: rocky/8.10/PowerTools/x86_64/os
-      timestamp: 20250614T013846
+      timestamp: 20250619T005337
     '9.4':
       path: rocky/9.4/CRB/x86_64/os
       timestamp: 20241115T003133
@@ -39,10 +39,10 @@ appliances_pulp_repos:
   epel:
     '8':
       path: epel/8/Everything/x86_64
-      timestamp: 20250615T234151
+      timestamp: 20250618T000200
     '9':
       path: epel/9/Everything/x86_64
-      timestamp: 20250615T000221
+      timestamp: 20250618T000200
   extras:
     '8.10':
       path: rocky/8.10/extras/x86_64/os
@@ -56,10 +56,10 @@ appliances_pulp_repos:
   grafana:
     '8':
       path: grafana/oss/rpm
-      timestamp: 20250615T005738
+      timestamp: 20250618T005941
     '9':
       path: grafana/oss/rpm
-      timestamp: 20250615T005738
+      timestamp: 20250618T005941
   openhpc_base:
     '8':
       path: OpenHPC/2/EL_8