Deploy storage read-write rpc to dynamic infrastructure

• swh/infra/ci-cd/swh-charts!311 (merged): Deploy read-write instance to dynamic infrastructure (with affinity swh/objstorage-read-write)
• Add affinity to saam 'swh/storage-pathslicing=true' [1]
• Checks [2]
• swh-apps@a0cc98f5: Adapt docker image to use the same uid/gid as saam/banco does [3]
• swh/infra/ci-cd/swh-charts@fedf1345: Bump docker image version for storage instances
• swh/infra/ci-cd/swh-charts!314 (merged): Migrate one writer worker to use that instance to test it's ok
• Migrate incrementally writer workload to ensure it's ok
  • git
  • add-forge-now
  • save-code-now
  • cvs
  • metadata
  • ...
• swh/infra/ci-cd/swh-charts!319 (closed): Stabilize writer workload
• swh/infra/ci-cd/swh-charts!316 (merged): Migrate remaining writers workload over to use the new rpc storage instance
• Checks
• (manual) Stop gunicorn-swh-storage (let icinga whine)
• Checks
• Decommission saam's storage gunicorn services
• docs: Update service-urls

Refs. #5110 (closed)

[1]

$ environment=production; kubectl --context archive-$environment-rke2 label --overwrite node saam swh/storage-pathslicing=true

[2]

┌────────────────────────────────────────────────────────────────────────────────────────────────── Pods(all)[4] </storage-postgresql-saa> ───────────────────────────────────────────────────────────────────────────────────────────────────┐
│ NAMESPACE↑       NAME                                                PF       READY             RESTARTS STATUS               CPU       MEM       %CPU/R       %CPU/L       %MEM/R       %MEM/L IP                  NODE        AGE         │
│ swh              storage-postgresql-saam-zfs-67bfdb7974-257pv        ●        1/1                      0 Running              396       261           79          n/a           25          n/a 10.42.155.15        saam        19m         │
│ swh              storage-postgresql-saam-zfs-67bfdb7974-dg9vf        ●        1/1                      0 Running              296       263           59          n/a           25          n/a 10.42.155.16        saam        19m         │
│ swh              storage-postgresql-saam-zfs-67bfdb7974-ktwhs        ●        1/1                      0 Running                3       263            0          n/a           25          n/a 10.42.155.13        saam        19m         │
│ swh              storage-postgresql-saam-zfs-67bfdb7974-wxkrm        ●        1/1                      0 Running                0         0            0          n/a            0          n/a 10.42.155.14        saam        19m         │

Depends on #5214 (closed)

Refs. swh-apps@b86a81c0 (like the objstorage image does)