Update makefile to pass installation tags

In #828 tags were introduced in the download_tools.yaml ecosystem. This
patch allows to use them from the Makefile directly, by introducing a
new DOWNLOAD_TOOLS_SELECTION parameter. By default, it will install all
the tools, like before.

This patch also ensure we do gather facts from the playbook. If we don't
gather facts, we end with this kind of error:

```
An exception occurred during task execution. To see the full traceback, use -vvv. The error was: NoneType: None
fatal: [localhost]: FAILED! => {"changed": false, "msg": "Could not detect which package manager to use. Try gathering facts or setting the \"use\" option."}
```

devsetup/Makefile

@@ -3,6 +3,7 @@ CRC_URL ?= 'https://developers.redhat.com/content-gateway/rest/mirror/pub/opensh
 KUBEADMIN_PWD ?= 12345678
 PULL_SECRET  ?= ${PWD}/pull-secret.txt
 TIMEOUT                  ?= 300s
+DOWNLOAD_TOOLS_SELECTION ?= all
 
 OCP_NETWORK_NAME ?=crc
 NETWORK_ISOLATION_USE_DEFAULT_NETWORK ?= true
@@ -156,9 +157,9 @@ help: ## Display this help.
 
 ##@ Download required tools and versions
 .PHONY: download_tools
-download_tools: ## Runs an ansible playbook to install required tools with the versions to develop the service operators. The tools get installed in ~/bin and go in /usr/local/go (alternatives get used to set it as the system wide go version)
+download_tools: ## Runs an ansible playbook to install required tools with the versions to develop the service operators. The tools get installed in ~/bin and go in /usr/local/go (alternatives get used to set it as the system wide go version). You can select installed tools using DOWNLOAD_TOOLS_SELECTION listing the wanted tags (dependencies, golang, kubectl, kustomize, kuttl, operator_sdk, opm, yq).
 	ANSIBLE_FORCE_COLOR=true ansible-playbook \
-	-v -i hosts \
+	-v -i hosts --tags ${DOWNLOAD_TOOLS_SELECTION} \
 	download_tools.yaml
 
 ##@ CRC

devsetup/download_tools.yaml

@@ -3,6 +3,6 @@
 - name: Download tools
   hosts: localhost
   vars_files: "vars/default.yaml"
-  gather_facts: false
+  gather_facts: true
   roles:
     - download_tools