[JENKINS-72450] Support alternate ssh implementations on Windows (#1706)

Author: akash-manna-sky

src/main/java/org/jenkinsci/plugins/gitclient/CliGitAPIImpl.java

@@ -2638,6 +2638,15 @@ public File getSSHExecutable() {
             return sshexe;
         }
 
+        // Check for ssh.exe on the system PATH (supports Microsoft OpenSSH and other alternate implementations)
+        String sshPath = getPathToExe("ssh");
+        if (sshPath != null) {
+            sshexe = new File(sshPath);
+            if (sshexe.exists()) {
+                return sshexe;
+            }
+        }
+
         // Check Program Files
         sshexe = getFileFromEnv("ProgramFiles", "\\Git\\bin\\ssh.exe");
         if (sshexe != null && sshexe.exists()) {