Deprecate spring-cloud-starter-parent

[spencergibb]

It has been unofficially deprecated for many years, please use the spring-cloud-dependencies.

  <properties>
    <!-- ... -->
    <spring-cloud.version>2025.0.0</spring-cloud.version>
  </properties>
  <dependencies>
    <!-- ... -->
  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-dependencies</artifactId>
        <version>${spring-cloud.version}</version>
        <type>pom</type>
        <scope>import</scope>
      </dependency>
    </dependencies>
  </dependencyManagement>

Add autoconfiguration that logs that this is deprecated and will be removed in the next major.