fix(lock) empty package and type in lock when dependsOn is a function

[haarchri]

Description of your changes

it is not possible to install functions with dependsOn in configurations - this leads to empty package and type in lock

apiVersion: meta.pkg.crossplane.io/v1
kind: Configuration
metadata:
  name: configuration-caas
  annotations:
[...]
spec:
  dependsOn:
    - provider: xpkg.upbound.io/crossplane-contrib/provider-helm
      version: ">=v0.15.0"
    - provider: xpkg.upbound.io/crossplane-contrib/provider-kubernetes
      version: ">=v0.9.0"
    - function: xpkg.upbound.io/crossplane-contrib/function-patch-and-transform
      version: ">=v0.1.3"

this results before this PR in:

apiVersion: pkg.crossplane.io/v1beta1
kind: Lock
metadata:
  name: lock
packages:
- dependencies:
  - constraints: '>=v0.15.0'
    package: xpkg.upbound.io/crossplane-contrib/provider-helm
    type: Provider
  - constraints: '>=v0.9.0'
    package: xpkg.upbound.io/crossplane-contrib/provider-kubernetes
    type: Provider
  - constraints: '>=v0.1.3'
    package: ""
    type: ""
[...]

after this PR:

kubectl get lock lock -o yaml
apiVersion: pkg.crossplane.io/v1beta1
kind: Lock
metadata:
  name: lock
packages:
- dependencies:
  - constraints: '>=v0.15.0'
    package: xpkg.upbound.io/crossplane-contrib/provider-helm
    type: Provider
  - constraints: '>=v0.9.0'
    package: xpkg.upbound.io/crossplane-contrib/provider-kubernetes
    type: Provider
  - constraints: '>=v0.1.3'
    package: xpkg.upbound.io/crossplane-contrib/function-patch-and-transform
    type: Function
[...]

Fixes #

I have:

• Read and followed Crossplane's contribution process.
• Added or updated unit and E2E tests for my change.
• Run make reviewable to ensure this PR is ready for review.
• Added backport release-x.y labels to auto-backport this PR, if necessary.
• Opened a PR updating the docs, if necessary.

[lsviben]

Thanks @haarchri