List available targets when incorrect target passed (#756)

## Changes
List available targets when incorrect target passed

## Tests
```
andrew.nester@HFW9Y94129 wheel % databricks bundle validate -t incorrect
Error: incorrect: no such target. Available targets: prod, development
```

bundle/config/mutator/select_target.go

@@ -3,8 +3,10 @@ package mutator
 import (
 	"context"
 	"fmt"
+	"strings"
 
 	"github.com/databricks/cli/bundle"
+	"golang.org/x/exp/maps"
 )
 
 type selectTarget struct {
@@ -30,7 +32,7 @@ func (m *selectTarget) Apply(_ context.Context, b *bundle.Bundle) error {
 	// Get specified target
 	target, ok := b.Config.Targets[m.name]
 	if !ok {
-		return fmt.Errorf("%s: no such target", m.name)
+		return fmt.Errorf("%s: no such target. Available targets: %s", m.name, strings.Join(maps.Keys(b.Config.Targets), ", "))
 	}
 
 	// Merge specified target into root configuration structure.

bundle/tests/suggest_target_test.go

@@ -0,0 +1,17 @@
+package config_tests
+
+import (
+	"path/filepath"
+	"testing"
+
+	"github.com/databricks/cli/internal"
+	"github.com/stretchr/testify/require"
+)
+
+func TestSuggestTargetIfWrongPassed(t *testing.T) {
+	t.Setenv("BUNDLE_ROOT", filepath.Join("target_overrides", "workspace"))
+	_, _, err := internal.RequireErrorRun(t, "bundle", "validate", "-e", "incorrect")
+	require.ErrorContains(t, err, "Available targets:")
+	require.ErrorContains(t, err, "development")
+	require.ErrorContains(t, err, "staging")
+}