Add an acceptance test for ssh connection to serverless GPU clusters (#4579)

## Changes
<!-- Brief summary of your changes that is easy to understand -->

Introduce a new cloud test that makes a simple connection to a
serverless gpu compute with "echo 'Hello'" and check that databricks ssh
connect output has it.

Author: anton-107

acceptance/ssh/connect-serverless-gpu/out.stdout.txt

@@ -0,0 +1 @@
+Connection successful

acceptance/ssh/connect-serverless-gpu/out.test.toml

@@ -0,0 +1,6 @@
+errcode $CLI ssh connect --name serverless-gpu-test --accelerator=GPU_1xA10 --releases-dir=$CLI_RELEASES_DIR -- "echo 'Connection successful'" >out.stdout.txt 2>LOG.stderr
+
+if ! grep -q "Connection successful" out.stdout.txt; then
+  run_id=$(cat LOG.stderr | grep -o "Job submitted successfully with run ID: [0-9]*" | grep -o "[0-9]*$")
+  trace $CLI jobs get-run "$run_id" > LOG.job
+fi

acceptance/ssh/connect-serverless-gpu/output.txt

@@ -0,0 +1,12 @@
+Local = false
+Cloud = true
+
+# Serverless GPU is only available in newer environments
+RequiresUnityCatalog = true
+
+# Serverless GPU is not available in GCP yet
+[CloudEnvs]
+  gcp = false
+
+[EnvMatrix]
+  DATABRICKS_BUNDLE_ENGINE = ["direct"]