Create rule S6466: Accessing an array element should not trigger a panic (#4684)

* Add rust to rule S6466

* Update RSPEC

* Remove tag

---------

Co-authored-by: yassin-kammoun-sonarsource <yassin-kammoun-sonarsource@users.noreply.github.com>
Co-authored-by: yassin-kammoun-sonarsource <yassin.kammoun@sonarsource.com>

rules/S6466/rust/metadata.json

@@ -0,0 +1,24 @@
+{
+  "title": "Accessing an array element should not trigger a panic",
+  "type": "BUG",
+  "code": {
+    "impacts": {
+      "RELIABILITY": "HIGH"
+    },
+    "attribute": "LOGICAL"
+  },
+  "status": "ready",
+  "remediation": {
+    "func": "Constant\/Issue",
+    "constantCost": "10min"
+  },
+  "tags": [
+    "clippy"
+  ],
+  "defaultSeverity": "Critical",
+  "ruleSpecification": "RSPEC-6466",
+  "sqKey": "S6466",
+  "scope": "All",
+  "defaultQualityProfiles": ["Sonar way"],
+  "quickfix": "unknown"
+}

rules/S6466/rust/rule.adoc

@@ -0,0 +1,37 @@
+== Why is this an issue?
+
+An array index out-of-bounds panic is a bug class that occurs in Rust when a
+program tries to access an array element that does not exist.
+This bug can cause your program to crash or behave unexpectedly.
+
+include::../impact.adoc[]
+
+== How to fix it
+
+To fix an array index out of bounds panic in Rust, you should always ensure
+that you are accessing array elements within the bounds of the array.
+
+=== Code examples
+
+==== Noncompliant code example
+
+[source,rust,diff-id=1,diff-type=noncompliant]
+----
+let x = [1, 2, 3, 4];
+
+x[9]; // Out of bounds indexing
+----
+
+==== Compliant solution
+
+[source,rust,diff-id=1,diff-type=compliant]
+----
+let x = [1, 2, 3, 4];
+
+x[0];
+----
+
+== Resources
+=== Documentation
+
+* Clippy Lints - https://rust-lang.github.io/rust-clippy/master/index.html#out_of_bounds_indexing