Add template test to confirm the output when uv is not found (#3240)

## Why

We should provide installation instructions when uv is not found when we
try to execute it. This test confirms the baseline to improve.

Author: pietern

acceptance/bundle/templates/default-python/fail-missing-uv/input.json

@@ -0,0 +1,7 @@
+{
+    "project_name": "fail_missing_uv",
+    "include_notebook": "no",
+    "include_dlt": "no",
+    "include_python": "yes",
+    "serverless": "no"
+}

acceptance/bundle/templates/default-python/fail-missing-uv/out.test.toml

@@ -0,0 +1,5 @@
+Local = true
+Cloud = false
+
+[EnvMatrix]
+  DATABRICKS_CLI_DEPLOYMENT = ["terraform", "direct-exp"]

acceptance/bundle/templates/default-python/fail-missing-uv/output.txt

@@ -0,0 +1,28 @@
+
+>>> [CLI] bundle init default-python --config-file ./input.json --output-dir output
+
+Welcome to the default Python template for Databricks Asset Bundles!
+Workspace to use (auto-detected, edit in 'fail_missing_uv/databricks.yml'): [DATABRICKS_URL]
+
+✨ Your new project has been created in the 'fail_missing_uv' directory!
+
+Please refer to the README.md file for "getting started" instructions.
+See also the documentation at https://docs.databricks.com/dev-tools/bundles/index.html.
+
+>>> [CLI] bundle validate
+Name: fail_missing_uv
+Target: dev
+Workspace:
+  Host: [DATABRICKS_URL]
+  User: [USERNAME]
+  Path: /Workspace/Users/[USERNAME]/.bundle/fail_missing_uv/dev
+
+Validation OK!
+
+>>> [CLI] bundle deploy
+Building python_artifact...
+Error: build failed python_artifact, error: exit status 127, output: bash: uv: command not found
+
+
+
+Exit code: 1

acceptance/bundle/templates/default-python/fail-missing-uv/script

@@ -0,0 +1,13 @@
+trace $CLI bundle init default-python --config-file ./input.json --output-dir output
+
+cd output/fail_missing_uv
+trace $CLI bundle validate
+
+# Dynamically find the directory containing 'uv' and remove it from PATH
+uv_dir=$(dirname "$(command -v uv 2>/dev/null || which uv 2>/dev/null)")
+if [ -n "$uv_dir" ]; then
+  export PATH=$(echo "$PATH" | tr ':' '\n' | grep -v "^$uv_dir$" | paste -sd: -)
+fi
+
+# Try to deploy, expect failure due to missing uv
+errcode trace $CLI bundle deploy

acceptance/bundle/templates/default-python/fail-missing-uv/test.toml

@@ -0,0 +1,13 @@
+Badness = "The error message is not ideal: it reports a generic build failure or 'command not found' instead of a clear message that 'uv' is missing from the environment."
+
+Local = true
+Cloud = false
+
+Ignore = [
+    'output/fail_missing_uv',
+]
+
+# Replace the uv not found error for portability
+[[Repls]]
+Old = '(/usr)?(/bin)?/bash(: line 1)?: uv: command not found'
+New = 'bash: uv: command not found'