Add pulsar-client-reactive-api to spring-pulsar-reactive (#614)

The pulsar-client-reactive-api transitively includes the
pulsar-client-api. To insulate against different Pulsar client versions
in the Pulsar Reactive Client and Spring Pulsar we exclude this
transitive dependency and then include the version dictated by Spring
Pulsar. This is the same technique that is already done for the
pulsar-client-reactive-adapter.

gradle/libs.versions.toml

@@ -50,6 +50,7 @@ micrometer-docs-gen = { module = "io.micrometer:micrometer-docs-generator", vers
 micrometer-tracing-bom = { module = "io.micrometer:micrometer-tracing-bom", version.ref = "micrometer-tracing" }
 protobuf-java = { module = "com.google.protobuf:protobuf-java", version.ref = "protobuf" }
 pulsar-client-all = { module = "org.apache.pulsar:pulsar-client-all", version.ref = "pulsar" }
+pulsar-client-reactive-api = { module = "org.apache.pulsar:pulsar-client-reactive-api", version.ref = "pulsar-reactive" }
 pulsar-client-reactive-adapter = { module = "org.apache.pulsar:pulsar-client-reactive-adapter", version.ref = "pulsar-reactive" }
 pulsar-client-reactive-producer-cache-caffeine-shaded = { module = "org.apache.pulsar:pulsar-client-reactive-producer-cache-caffeine-shaded", version.ref = "pulsar-reactive" }
 pulsar-functions-api = { module = "org.apache.pulsar:pulsar-functions-api", version.ref = "pulsar" }

spring-pulsar-reactive/spring-pulsar-reactive.gradle

@@ -6,9 +6,16 @@ description = 'Spring Pulsar Reactive Support'
 
 dependencies {
 	api project (':spring-pulsar')
+	api (libs.pulsar.client.reactive.api) {
+		// spring-pulsar includes a pulsar-client-api with its unwanted transitive deps excluded
+		exclude group: "org.apache.pulsar", module: "pulsar-client-api"
+	}
 	api (libs.pulsar.client.reactive.adapter) {
 		// spring-pulsar includes a pulsar-client with its unwanted transitive deps excluded
 		exclude group: "org.apache.pulsar", module: "pulsar-client"
+		// (above) we include a pulsar-client-reactive-api whose pulsar-client-api with
+		// unwanted transitive deps excluded
+		exclude group: "org.apache.pulsar", module: "pulsar-client-reactive-api"
 	}
 	api(libs.pulsar.client.reactive.producer.cache.caffeine.shaded) {
 		// (above) we include a pulsar-client-reactive-adapter whose pulsar-client with