Create rule S1862: Related "if/else if" statements should not have the same condition (#4687)

* Add rust to rule S1862

* Add rule description

* Fix errors

* Add link to Clippy lint

---------

Co-authored-by: sallaigy <sallaigy@users.noreply.github.com>
Co-authored-by: Gyula Sallai <gyula.sallai@sonarsource.com>
Co-authored-by: yassin-kammoun-sonarsource <yassin.kammoun@sonarsource.com>

rules/S1862/rule.adoc

@@ -1,4 +1,3 @@
 == Why is this an issue?
 
 include::description.adoc[]
-

rules/S1862/rust/metadata.json

@@ -0,0 +1,8 @@
+{
+  "title": "Related \"if\/else if\" statements should not have the same condition",
+  "tags": [
+    "clippy",
+    "unused",
+    "pitfall"
+  ]
+}

rules/S1862/rust/rule.adoc

@@ -0,0 +1,53 @@
+== Why is this an issue?
+
+include::../description.adoc[]
+
+=== Noncompliant code example
+
+[source,rust,diff-id=1,diff-type=noncompliant]
+----
+if param == 1 {
+  openWindow();
+} else if param == 2 {
+  closeWindow();
+} else if param == 1 { // Noncompliant
+  moveWindowToTheBackground();
+}
+----
+
+=== Compliant solution
+
+[source,rust,diff-id=1,diff-type=compliant]
+----
+if param == 1 {
+  openWindow();
+} else if param == 2 {
+  closeWindow();
+} else if param == 3 {
+  moveWindowToTheBackground();
+}
+----
+
+== Resources
+
+=== Documentation
+
+* Clippy Lints - https://rust-lang.github.io/rust-clippy/master/index.html#ifs_same_cond
+
+ifdef::env-github,rspecator-view[]
+
+'''
+== Implementation Specification
+(visible only on this page)
+
+include::../message.adoc[]
+
+include::../highlighting.adoc[]
+
+'''
+== Comments And Links
+(visible only on this page)
+
+include::../comments-and-links.adoc[]
+
+endif::env-github,rspecator-view[]