pure storage flash array example

[hecomp]

Description

What does this PR do?

• Added pure storage flash array example.

*Pure FlashArray is a physical device. It's a hardware storage solution primarily designed with flash memory to provide high-speed, low-latency access to data. We cannot directly simulate the full functionality and behavior of a physical Pure FlashArray device using Docker. pure-fa-om-exporter interact with Pure FlashArray scraping endpoints, to monitor Pure Storage appliances.

PR checklist for examples

Check these items before merging the PR.

• Each example contains a README file.
• README documents all steps and variables required to run the example. The simplest way to confirm this is to follow the instructions on a clean machine.
• README file contains the links to the official documentation with relevant configuration and to the metrics published if that is available.
• Used images of apps and collectors have to be pinned, "latest" should never be used.
• Evidences with screenshots provided from the reviewer.
• Includes a file called metrics.csv with metrics produced by the example.
  The file should have these 5 headings: Name, Description, Unit, DataType, Attributes.
  Description is not provided for all metrics, so it may be blank. Attributes are also not always provided. When there are multiple attributes on a metric reord they should be space separated.
• Dashboard provided with example and put to the folder "dashboard" inside the example folder.
• At least one screenshot of the proposed dashboard is included in this PR. If you're proposing substantive changes to queries or new queries then please ensure your screenshot shows relevant data.
• All chart names in the dashboard are in Title case.
• All query names in the dashboard are lower case letters, beginning the first query of each chart as "a" and proceeding alphabetically ... "b", "c", etcetera.

[nslaughter]

This example still doesn't like the scrape config for the collector/prometheus receiver.

In logs it says...

otel-collector                 | * error decoding 'receivers': error reading configuration for "prometheus": prometheus receiver failed to unmarshal yaml to prometheus config: yaml: unmarshal errors:
otel-collector                 |   line 2: field headers not found in type config.ScrapeConfig
otel-collector                 |   line 13: field headers not found in type config.ScrapeConfig
otel-collector                 |   line 23: field headers not found in type config.ScrapeConfig
otel-collector                 |   line 33: field headers not found in type config.ScrapeConfig
otel-collector                 |   line 43: field headers not found in type config.ScrapeConfig