[Templating] deprecate DebuggerInterface

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | yes: deprecated DebuggerInterface and Debugger
| Tests pass?   | yes
| Fixed tickets | #8926
| License       | MIT

- [x] add suggested optional dependency in templating component to Psr log
- [x] remove ProjectTemplateDebugger from tests