### Body

We had an issue where extra link class (`AIPlatformConsoleLink`) was removed in [PR](https://github.com/apache/airflow/pull/26836) without removing the class from the `provider.yaml` extra links this resulted in web server exception as shown in https://github.com/apache/airflow/pull/28449


**The Task:**
Add validation that classes of extra-links in provider.yaml are importable

### Committer

- [X] I acknowledge that I am a maintainer/committer of the Apache Airflow project.
"""Get architecture."""
        return _MACHINE_TO_ARCHITECTURE.get(platform.machine().lower())
_MACHINE_TO_ARCHITECTURE = {
    "amd64": Architecture.X86_64,
    "x86_64": Architecture.X86_64,
    "i686-64": Architecture.X86_64,
    "i386": Architecture.X86,
    "i686": Architecture.X86,
    "x86": Architecture.X86,
    "ia64": Architecture.X86,  
    "powerpc": Architecture.PPC,
    "power macintosh": Architecture.PPC,
    "ppc64": Architecture.PPC,
    "armv6": Architecture.ARM,
    "armv6l": Architecture.ARM,
    "arm64": Architecture.ARM,
    "armv7": Architecture.ARM,
    "armv7l": Architecture.ARM,
}
class AirflowInfo:
    """Renders information about Airflow instance."""
    def __init__(self, anonymizer):
        self.anonymizer = anonymizer
    @staticmethod
    def _get_version(cmd: list[str], grep: bytes | None = None):