docs(alerting): Examples of dynamic labels and dynamic thresholds (#105776)

* docs(alerting): Add dynamic thresholds example

* update intro

* docs(alerting): Example of dynamic labels

* fix template example

* Update docs/sources/alerting/best-practices/dynamic-labels.md

Co-authored-by: Johnny Kartheiser <140559259+JohnnyK-Grafana@users.noreply.github.com>

* Update docs/sources/alerting/best-practices/dynamic-labels.md

Co-authored-by: Johnny Kartheiser <140559259+JohnnyK-Grafana@users.noreply.github.com>

* Update docs/sources/alerting/best-practices/dynamic-labels.md

Co-authored-by: Johnny Kartheiser <140559259+JohnnyK-Grafana@users.noreply.github.com>

* Update docs/sources/alerting/best-practices/dynamic-labels.md

Co-authored-by: Johnny Kartheiser <140559259+JohnnyK-Grafana@users.noreply.github.com>

* Update docs/sources/alerting/best-practices/dynamic-labels.md

Co-authored-by: Johnny Kartheiser <140559259+JohnnyK-Grafana@users.noreply.github.com>

* Update docs/sources/alerting/best-practices/dynamic-thresholds.md

Co-authored-by: Johnny Kartheiser <140559259+JohnnyK-Grafana@users.noreply.github.com>

* Update docs/sources/alerting/best-practices/dynamic-thresholds.md

Co-authored-by: Johnny Kartheiser <140559259+JohnnyK-Grafana@users.noreply.github.com>

* Update docs/sources/alerting/best-practices/dynamic-thresholds.md

Co-authored-by: Johnny Kartheiser <140559259+JohnnyK-Grafana@users.noreply.github.com>

* Update docs/sources/alerting/best-practices/dynamic-labels.md

Co-authored-by: Johnny Kartheiser <140559259+JohnnyK-Grafana@users.noreply.github.com>

* Update docs/sources/alerting/best-practices/dynamic-labels.md

Co-authored-by: Johnny Kartheiser <140559259+JohnnyK-Grafana@users.noreply.github.com>

* Update docs/sources/alerting/best-practices/dynamic-labels.md

Co-authored-by: Johnny Kartheiser <140559259+JohnnyK-Grafana@users.noreply.github.com>

* Update docs/sources/alerting/best-practices/dynamic-labels.md

Co-authored-by: Johnny Kartheiser <140559259+JohnnyK-Grafana@users.noreply.github.com>

* Update docs/sources/alerting/best-practices/dynamic-labels.md

Co-authored-by: Johnny Kartheiser <140559259+JohnnyK-Grafana@users.noreply.github.com>

* Update docs/sources/alerting/best-practices/dynamic-labels.md

Co-authored-by: Johnny Kartheiser <140559259+JohnnyK-Grafana@users.noreply.github.com>

* Update docs/sources/alerting/best-practices/dynamic-labels.md

Co-authored-by: Johnny Kartheiser <140559259+JohnnyK-Grafana@users.noreply.github.com>

* fix typo

* fix typo

* Add section `CSV data with Infinity` in Table data example

* Link dynamic threshold example to tabular data requirements

* minor copy changes

* minor heading fix

* Add links (admonition) to Grafana Play examples

* Use `Caveat` instead of `Gotcha`

* Dynamic thresholds: caution message when Math operates on missing series

* Exampleof latency threshold based on traffic

---------

Co-authored-by: Johnny Kartheiser <140559259+JohnnyK-Grafana@users.noreply.github.com>

docs/sources/alerting/alerting-rules/templates/examples.md

@@ -16,11 +16,11 @@ title: Labels and annotations template examples
 menuTitle: Examples
 weight: 102
 refs:
-  shared-stale-alert-instances:
+  shared-dynamic-label-example:
     - pattern: /docs/grafana/
-      destination: /docs/grafana/<GRAFANA_VERSION>/alerting/fundamentals/alert-rule-evaluation/stale-alert-instances/
+      destination: /docs/grafana/<GRAFANA_VERSION>/alerting/best-practices/dynamic-labels/
     - pattern: /docs/grafana-cloud/
-      destination: /docs/grafana-cloud/alerting-and-irm/alerting/fundamentals/alert-rule-evaluation/stale-alert-instances/
+      destination: /docs/grafana-cloud/alerting-and-irm/alerting/best-practices/dynamic-labels/
   labels:
     - pattern: /docs/grafana/
       destination: /docs/grafana/<GRAFANA_VERSION>/alerting/fundamentals/alert-rules/annotation-label/#labels
@@ -217,7 +217,7 @@ You can then use the `severity` label to control how alerts are handled. For ins
 > **Note:** An alert instance is uniquely identified by its set of labels.
 >
 > - Avoid displaying query values in labels, as this can create numerous alert instances—one for each distinct label set. Instead, use annotations for query values.
-> - If a templated label's value changes, it maps to a different alert instance, and the previous instance is considered [stale (MissingSeries)](ref:shared-stale-alert-instances) when its label value is no longer present.
+> - If a templated label's value changes, it maps to a different alert instance, and the previous instance is considered **stale**. Learn all the details in this [example using dynamic labels](ref:shared-dynamic-label-example).
 
 [//]: <> ({{< docs/shared lookup="alerts/note-dynamic-labels.md" source="grafana" version="<GRAFANA_VERSION>" >}})