defaultCollection is relative to where cmd is run not angular.json

[kvart714]

🐞 Bug report

Command (mark with an x)

• new
• build
• serve
• test
• e2e
• generate
• add
• update
• lint
• extract-i18n
• run
• config
• help
• version
• doc

Is this a regression?

No, it's is duplicate of #15014

Description

🔬 Minimal Reproduction

Repo example: https://github.com/kvart714/ng-g-c-bug

It includes custom schematic.
Command ng g c works in project folder, but not works in nested folders due to relative path.

[kvart714]

@alan-agius4 I tried your fix. Now it works, but it works differently between default and custom schematics. This ignores any subfolders now.

In the screenshot, I ran the command twice from the same folder, but the components were created in different folders:

I commit example: https://github.com/kvart714/ng-g-c-bug