fix(studio): ssh config causing remote connection errors to SageMaker Studio compute (aws#8156)

Problem:
Incorrect SSH configuration causing connection failures

Solution:
- Updated SSH config by removing "User '%r'" to properly handle remote
connections to Studio compute

Co-authored-by: Arkaprava De <[email protected]>

Author: arkaprava08

packages/core/src/shared/sshConfig.ts

@@ -208,7 +208,7 @@ Host ${this.configHostName}
 
     protected createSSHConfigSection(proxyCommand: string): string {
         if (this.scriptPrefix === 'sagemaker_connect') {
-            return `${this.getSageMakerSSHConfig(proxyCommand)}User '%r'\n`
+            return `${this.getSageMakerSSHConfig(proxyCommand)}`
         } else if (this.keyPath) {
             return `${this.getBaseSSHConfig(proxyCommand)}IdentityFile '${this.keyPath}'\n    User '%r'\n`
         }