Added telemetry for Rhai usage

.changesets/maint_feature_rhaitelemetry.md

@@ -0,0 +1,5 @@
+### Added telemetry for Rhai usage ([PR #6027](https://github.com/apollographql/router/pull/6027))
+
+Added telemetry for Rhai usage
+
+By [@andrewmcgivery](https://github.com/andrewmcgivery) in https://github.com/apollographql/router/pull/6027

apollo-router/src/configuration/metrics.rs

@@ -210,6 +210,14 @@ impl InstrumentData {
             opt.subgraph.response,
             "$.subgraph..response"
         );
+        populate_config_instrument!(
+            apollo.router.config.rhai,
+            "$.rhai",
+            opt.scripts,
+            "$[?(@.scripts)]",
+            opt.main,
+            "$[?(@.main)]"
+        );
         populate_config_instrument!(
             apollo.router.config.persisted_queries,
             "$.persisted_queries[?(@.enabled == true)]",

apollo-router/src/configuration/snapshots/apollo_router__configuration__metrics__test__metrics@rhai.router.yaml.snap

@@ -0,0 +1,11 @@
+---
+source: apollo-router/src/configuration/metrics.rs
+expression: "&metrics.non_zero()"
+---
+- name: apollo.router.config.rhai
+  data:
+    datapoints:
+      - value: 1
+        attributes:
+          opt.main: true
+          opt.scripts: true

apollo-router/src/configuration/testdata/metrics/rhai.router.yaml

@@ -0,0 +1,3 @@
+rhai:
+  scripts: rhai
+  main: main.rhai