Provide region config in s3 clickhouse-instance.yaml

[BryanFauble]

I was implementing cold storage and backups for clickhouse and ran into issues getting everything to work. I had raised a GH issue in the backup repo here. The resolution to the issue was to include a region XML tag in the storage.xml config file for clickhouse:

https://github.com/SigNoz/charts/blob/main/charts/clickhouse/templates/clickhouse-instance/clickhouse-instance.yaml#L60-L114

I was able to use post renders (via FluxCD) to patch this in, but other CD tools like ArgoCD don't natively have this functionality.

For this issue the region should be added as a field that can be supplied and injected into the rendered storage.xml file for clickhouse.