Refactor Plus Scraper

[aphralG]

Proposed changes

Took the recording of each metric out of scraper.go and into record/<metrics type>_metric.go
For metrics which require recording the previous metrics like HTTPTotal, Location & Server Zone had to create a struct in each.

Created the below after removing the recording from scraper.go
collector/nginxplusreciever/record/

• cahce_metrics.go
• http_mertics.go
• upstream_mertics.go
• location_zone_mertics.go
• server_zone_mertics.go
• stream_mertics.go
• ssl_mertics.go

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING document
• I have run make install-tools and have attached any dependency changes to this pull request
• If applicable, I have added tests that prove my fix is effective or that my feature works
• If applicable, I have checked that any relevant tests pass after adding my changes
• If applicable, I have updated any relevant documentation (README.md)
• If applicable, I have tested my cross-platform changes on Ubuntu 22, Redhat 8, SUSE 15 and FreeBSD 13