fix: print errors when reporting on a new PV with errors

[WillieRuemmele]

What does this PR do?

force:package:beta:version:create:report now will include errors

 ➜  sfdx force:package:beta:version:create:report -i 08c3i000000fyoVAAQ 
=== Package Version Create Request

 Name                          Value              
 ───────────────────────────── ────────────────── 
 ID                            08c3i000000fyoVAAQ 

=== Errors

(1) Create_property: geocode_address (Action) - We can't find an action with the name and action type that you specified.
(2) dreamhouse: In field: apexClass - no ApexClass named PagedResult found
(3) PropertyController: Variable does not exist: result
(4) PropertyController: Variable does not exist: result

changes the --json output to match toolbelt, toolbelt has an array of results, we were just returning the result

 ➜  sfdx force:package:version:create:report -i 08c3i000000fyoVAAQ  --json
{
  "status": 0,
+  "result": [ {
- "result": {
      "Id": "08c3i000000fyoVAAQ",

What issues does this PR fix or reference?

@W-11983124@
forcedotcom/cli#1779