Create rule S7089: Inline vector literals should be preferred to chains of insertions (#4741)

* Add rust to rule S7089

* Update RSPEC

---------

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

rules/S7089/dart/metadata.json

@@ -1,23 +1,2 @@
 {
-  "title": "Inline list literals should be preferred to chains of insertions",
-  "type": "CODE_SMELL",
-  "status": "ready",
-  "remediation": {
-    "func": "Constant\/Issue",
-    "constantCost": "5min"
-  },
-  "tags": [
-  ],
-  "defaultSeverity": "Major",
-  "ruleSpecification": "RSPEC-7089",
-  "sqKey": "S7089",
-  "scope": "All",
-  "defaultQualityProfiles": ["Sonar way"],
-  "quickfix": "unknown",
-  "code": {
-    "impacts": {
-      "MAINTAINABILITY": "MEDIUM"
-    },
-    "attribute": "EFFICIENT"
-  }
 }

rules/S7089/metadata.json

@@ -1,2 +1,23 @@
 {
+  "title": "Inline list literals should be preferred to chains of insertions",
+  "type": "CODE_SMELL",
+  "status": "ready",
+  "remediation": {
+    "func": "Constant\/Issue",
+    "constantCost": "5min"
+  },
+  "tags": [
+  ],
+  "defaultSeverity": "Major",
+  "ruleSpecification": "RSPEC-7089",
+  "sqKey": "S7089",
+  "scope": "All",
+  "defaultQualityProfiles": ["Sonar way"],
+  "quickfix": "unknown",
+  "code": {
+    "impacts": {
+      "MAINTAINABILITY": "MEDIUM"
+    },
+    "attribute": "EFFICIENT"
+  }
 }

rules/S7089/rust/metadata.json

@@ -0,0 +1,6 @@
+{
+  "title": "Inline vector literals should be preferred to chains of insertions",
+  "tags": [
+    "clippy"
+  ]
+}

rules/S7089/rust/rule.adoc

@@ -0,0 +1,34 @@
+== Why is this an issue?
+
+Initializing a vector with a chain of ``++push++`` invocations is less efficient than making the initialization with a single vector literal. Each invocation has a cost in itself.
+
+On top of the performance argument, the vector literal is more concise and easier to read.
+
+== How to fix it
+
+Introduce a single vector literal that includes all the elements that are added to the vector as arguments of the ``++push++`` invocations.
+
+=== Code examples
+
+==== Noncompliant code example
+
+[source,rust,diff-id=1,diff-type=noncompliant]
+----
+let mut v = Vec::new();
+v.push(0);
+v.push(1);
+v.push(2);
+----
+
+==== Compliant solution
+
+[source,rust,diff-id=1,diff-type=compliant]
+----
+let v = vec![0, 1, 2];
+----
+
+== Resources
+
+=== Documentation
+
+* Clippy Lints - https://rust-lang.github.io/rust-clippy/master/index.html#vec_init_then_push