Table size name metric correction

[keithf4]

Describe the issue:
The table size metric (ccp_table_size_size_bytes) mistakenly has the word "size" in it twice. This had been corrected in the 10.4 grafana dashboard but not in the metric name itself in the sql_exporter and postgres_exporter

Describe the expected behavior:
Correct ccp_table_size_size_bytes to ccp_table_size_bytes in all relevant locations

Note this has been fixed in the 4.12 Stable branch, so this just needs to be done in 5.x

Tell us about your environment:

• pgMonitor version: 5.1.0
• Container or non-container:
• Container name / image:
• Operating System for non-container:
• PostgreSQL Version:
• Exporter(s) in use (incl. version):
• Prometheus version:
• AlertManager version:
• Grafana version: 10.4