added-binary-arithmetic-operators-logical-operators-topk

[HarshitNagpal29]

Modified the 6_loadgen.yaml file to include tests for the additional PromQL features mentioned in the issue:

1. Binary Arithmetic Operators (Joins)
2. Logical Operators (and, or, unless)
3. TopK

[HarshitNagpal29]

@bboreham sir, can you kindly approve it so that it can be merged?

[SuperQ]

This needs a DCO sign-off. You can use git commit -s --amend to add it.

[bboreham]

For reference, I copied this from http://prombench.prometheus.io/14920/prometheus-release/tsdb-status:

Top 10 series count by metric names

Name	Count
codelab_api_request_duration_seconds_bucket	5005000
codelab_api_request_duration_seconds_sum	192500
codelab_api_requests_total	192500
codelab_api_request_duration_seconds_count	192500
codelab_api_request_errors_total	96250
go_gc_duration_seconds	68780
scrape_samples_post_metric_relabeling	13759
scrape_samples_scraped	13759
scrape_duration_seconds	13759
scrape_series_added	13759

[HarshitNagpal29]

@bboreham Hi Sir, hope you are doing well, thanks for your reply, currently I am having my university exams till the end of this month, so not able to look into this matter for now, but as soon as it will end, I will review it properly and make appropriate changes. Hope you understand.

[bboreham]

No problem; I think @kushalShukla-web is going to take a look.

[bboreham]

This was overtaken by #747. Thanks for your contribution!