Application fails to start when using Pulsar binder in multi-binder scenario

Scenario

A Spring Boot application using SCSt w/ Pulsar binder as input and Kafka binder as an output.

Problem

App fails to start w/ following message:

No qualifying bean of type 'org.springframework.pulsar.core.PulsarAdministration.

Expected Behavior

Application starts with Pulsar as input binder and Kafka as output binder.

Details

The reporting user followed this guide to configure the binders w/ the following yaml:

      binders:
        kafka:
          type: kafka
          (...)
        pulsar:
          type: pulsar
          environment:
            spring:
              cloud:
                stream:
                  pulsar:
                    binder:
                      config:
                        serviceUrl: pulsar://localhost:6650
                        adminUrl: http://localhost:8080

After deleting the environment property from pulsar binder config above, everything is fine, but it disables the possibility of additional configuration at this level.

Original report: https://stackoverflow.com/questions/79046248/springboot-spring-cloud-stream-pulsar-binder-startup-failed

Start with the binder configuration in the issue and compare it with the multiple-binders guide linked in the report, focusing on the Pulsar binder environment settings. Reproduce the startup failure with Pulsar as input and Kafka as output, and consider the issue done when the application starts while retaining that environment configuration.