Fix `databricks configure` to use DATABRICKS_CONFIG_FILE environment variable if exists as config file (#1325)

## Changes
added `ConfigFile: cfg.ConfigFile` for `databrickscfg.SaveToProfile` in
`cmd/configure/configure.go` to save the file in a specified path when
the value is not empty

## Tests
`TestConfigFileFromEnvNoInteractive` in
`cmd/configure/configure_test.go` sets a different config file path by
`DATABRICKS_CONFIG_FILE`, after execution, the overwrite config file is
generated, and the default path has no file.

cmd/configure/configure.go

@@ -139,10 +139,11 @@ The host must be specified with the --host flag or the DATABRICKS_HOST environme
 
 		// Save profile to config file.
 		return databrickscfg.SaveToProfile(ctx, &config.Config{
-			Profile:   cfg.Profile,
-			Host:      cfg.Host,
-			Token:     cfg.Token,
-			ClusterID: cfg.ClusterID,
+			Profile:    cfg.Profile,
+			Host:       cfg.Host,
+			Token:      cfg.Token,
+			ClusterID:  cfg.ClusterID,
+			ConfigFile: cfg.ConfigFile,
 		})
 	}
 

cmd/configure/configure_test.go

@@ -78,7 +78,8 @@ func TestConfigFileFromEnvNoInteractive(t *testing.T) {
 	//TODO: Replace with similar test code from go SDK, once we start using it directly
 	ctx := context.Background()
 	tempHomeDir := setup(t)
-	cfgPath := filepath.Join(tempHomeDir, ".databrickscfg")
+	defaultCfgPath := filepath.Join(tempHomeDir, ".databrickscfg")
+	cfgPath := filepath.Join(tempHomeDir, "overwrite-databricks-cfg")
 	t.Setenv("DATABRICKS_CONFIG_FILE", cfgPath)
 
 	inp := getTempFileWithContent(t, tempHomeDir, "token\n")
@@ -96,6 +97,13 @@ func TestConfigFileFromEnvNoInteractive(t *testing.T) {
 	_, err = os.Stat(cfgPath)
 	assert.NoError(t, err)
 
+	_, err = os.Stat(defaultCfgPath)
+	if runtime.GOOS == "windows" {
+		assert.ErrorContains(t, err, "cannot find the file specified")
+	} else {
+		assert.ErrorContains(t, err, "no such file or directory")
+	}
+
 	cfg, err := ini.Load(cfgPath)
 	assert.NoError(t, err)