[jb-gw] enable reading of ssh config (#18389)

to allow user customizations of connectivity, i.e. proxy jumps, see EXP-279

Author: akosyakov

components/ide/jetbrains/gateway-plugin/src/main/kotlin/io/gitpod/jetbrains/gateway/GitpodConnectionProvider.kt

@@ -338,7 +338,9 @@ class GitpodConnectionProvider : GatewayConnectionProvider {
             null,
             ProgressManager.getGlobalProgressIndicator(),
             false
-        ).withSshConnectionConfig {
+        )
+            .withParsingOpenSSHConfig(true)
+            .withSshConnectionConfig {
             val hostKeyVerifier = it.hostKeyVerifier
             if (hostKeyVerifier is OpenSshLikeHostKeyVerifier) {
                 val acceptHostKey = acceptHostKey(ideUrl, hostKeys)