Support Request from @disharma
Summary: Is this a known issue that the tekton pruner fails with error:
exec /bin/sh: argument list too long
if there are numerous namespaces(around 1900) in the cluster. 
The issue appears to occur because the pruner CronJob’s container definition includes a very long command-line argument list — it enumerates all namespaces/projects as arguments to the pruning command. When the number of namespaces grows large, the container fails immediately with the above error.

Customer case: 
Pipelines Version: 4.18

Workaround: NA

Steps to reproduce: - Create around 1900 NS and create pipelines in those NS. 
- Configure tekton pruner as below:
```
pruner:
  disabled: false
  keep-since: 4320
  resources:
    - taskrun
    - pipelinerun
  schedule: 30 * * * *
```

Additional Details: Attaching the related logs.