Allow to override default deployment mode (#854)

Add a setting that allows to make agentless the default deployment mode
in cases where a policy template has multiple deployment modes enabled.

spec/changelog.yml

@@ -15,6 +15,9 @@
     - description: Add support for Agentless resources.
       type: enhancement
       link: https://github.com/elastic/package-spec/pull/853
+    - description: Allow to override default deployment mode.
+      type: enhancement
+      link: https://github.com/elastic/package-spec/pull/854
 - version: 3.3.1
   changes:
     - description: Add validation rule to ensure security capability is added if there is any security rule asset.

spec/integration/manifest.spec.yml

@@ -163,6 +163,9 @@ spec:
           type: object
           properties:
             enabled:
+              description: >
+                Indicates if the default deployment mode is available for this template policy.
+                It is enabled by default.
               type: boolean
               default: true
         agentless:
@@ -173,6 +176,15 @@ spec:
           additionalProperties: false
           properties:
             enabled:
+              description: >
+                Indicates if the agentless deployment mode is available for this template policy.
+                It is disabled by default.
+              type: boolean
+              default: false
+            is_default:
+              description: >
+                On policy templates that support multiple deployment modes, this setting can be set to
+                true to use agentless mode by default.
               type: boolean
               default: false
             organization:
@@ -577,6 +589,12 @@ spec:
 
 # JSON patches for newer versions should be placed on top
 versions:
+  - before: 3.3.2
+    patch:
+      - op: remove
+        path: "/definitions/deployment_modes/properties/agentless/properties/is_default"
+      - op: remove
+        path: "/definitions/deployment_modes/properties/agentless/properties/resources"
   - before: 3.3.1
     patch:
       - op: remove

test/packages/bad_deployment_mode_resources/manifest.yml

@@ -1,4 +1,4 @@
-format_version: 3.2.2
+format_version: 3.3.2
 name: bad_deployment_mode
 title: "Bad Deployment Mode"
 version: 0.0.1

test/packages/good_v3/manifest.yml

@@ -36,6 +36,7 @@ policy_templates:
     deployment_modes:
       agentless:
         enabled: true
+        is_default: true
         organization: elastic
         division: observability
         team: obs-infraobs-integrations