docs: update metrics documentation

[Ansita20]

Related Issue

Fixes #1792

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Proposed Changes

This PR updates the Kyverno metrics documentation to clearly include and demonstrate the usage of kyverno_policy_results_total alongside kyverno_policy_results.

Key Updates

• Updated the metrics list to include kyverno_policy_results_total with consistent naming and references.
• Improved the Helm chart annotation example to correctly show both kyverno_policy_results and kyverno_policy_results_total.
• Enhanced Prometheus query examples to demonstrate the usage of both metrics in real-world monitoring scenarios.
• Updated the metrics reference section to reflect accurate metric names and queries.

Motivation

The existing documentation primarily focused on kyverno_policy_results, which could lead to confusion when users encounter kyverno_policy_results_total in monitoring setups.
By explicitly documenting both metrics and aligning examples, this change improves clarity, correctness, and usability of the Kyverno metrics documentation.

Visual Reference

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Checklist

• I have read the contributing guidelines.
• I have inspected the website preview for accuracy.
• I have signed off my issue.

[Copilot]

Pull request overview

This PR updates the Kyverno metrics documentation to correct the metric name from kyverno_policy_results to kyverno_policy_results_total, addressing issue #1792 where users discovered a mismatch between the documented metric name and the actual metric name in Prometheus.

Changes:

• Updated metric name references from kyverno_policy_results to kyverno_policy_results_total throughout the documentation
• Updated Prometheus query examples to use the correct metric name
• Updated DataDog OpenMetrics configuration examples in monitoring guide

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/content/docs/docs/reference/metrics.md	Updated metric name from kyverno_policy_results to kyverno_policy_results_total and corrected all Prometheus query examples to use the updated metric name
src/content/docs/docs/guides/monitoring.md	Updated metric name references in list items and DataDog OpenMetrics configuration examples to use kyverno_policy_results_total

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[Copilot]

The YAML example appears to be incomplete. The metrics array starting at line 210 is missing its closing brackets and the containing JSON objects are missing their closing braces. This should include the closing for the metrics array (]), the instance object (}), the instances array (]), and the openmetrics object (}).

Based on the second example later in the file (lines 223-251), the complete structure should look like:

            "metrics": [
              {"kyverno_policy_results_total": "policy_results"}
            ]
          }
        ]
      }
    }

Suggested change

	{"kyverno_policy_results_total": "policy_results"}
	{"kyverno_policy_results_total": "policy_results"}
	]
	}
	]
	}
	}