`skaffold init --XXenableJibInit` does not detect disconnected child projects with an inherited jib configuration

I'm using the following code in my parent pom:

```

com.google.cloud.tools
jib-maven-plugin
3.0.0

```

Note here: I'm **not** using it in my `pom.xml`.

### Expected behavior
```
skaffold init --XXenableJibInit

```

### Actual behavior
```
skaffold init --XXenableJibInit
one or more valid builder configuration (Dockerfile or Jib configuration) must be present to build images with skaffold; please provide at least one build config and try again or run `skaffold init --skip-build`
```

because scaffold not recognize the `jib-maven-plugin` in the parent pom.

### Information

- Skaffold version: 3.0.0
- Operating system: Ubuntu 20.04
- Installed via: skaffold.dev
- Contents of skaffold.yaml: empty

### Steps to reproduce the behavior

1. Create a bom.xml:

```

4.0.0

org.springframework.boot
spring-boot-starter-parent
2.4.4

de.test
parentbom
0.0.1-SNAPSHOT
pom
parentbom
parent bom

11
${java.version}
${java.version}
UTF-8
UTF-8

org.springframework.boot
spring-boot-starter-web


org.springframework.boot
spring-boot-starter-test
test


org.junit.vintage
junit-vintage-engine

org.springframework.boot
spring-boot-maven-plugin


org.apache.maven.plugins
maven-compiler-plugin


com.google.cloud.tools
jib-maven-plugin
3.0.0

```

use that bom in a project with pom.xml:

```

4.0.0

de.test
parentbom
0.0.1-SNAPSHOT

de.test
testapp
0.0.1-SNAPSHOT
testapp
testapp

```

try: `skaffold init --XXenableJibInit`
it is not working as i said. Because its not recognized. But i have the plugin (but in parent bom)

now try it with this pom which would work of course:

```

4.0.0

de.test
parentbom
0.0.1-SNAPSHOT

de.test
testapp
0.0.1-SNAPSHOT
testapp
testapp

com.google.cloud.tools
jib-maven-plugin
3.0.0

```

thank you