Deprecate Couchbase SSL keyStore properties

The properties `spring.couchbase.env.ssl.key-store`
and `spring.couchbase.env.ssl.key-store-password`
are deprecated in favor of configuring an SSL bundle with
`spring.couchbase.env.ssl.bundle`. The older properties
have somewhat confusing names, since they are used to
configure a trust store in Couchbase, and they don't
provide all the options that an SSL bundle provides.

Closes gh-35135

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/couchbase/CouchbaseAutoConfiguration.java

@@ -129,6 +129,7 @@ public class CouchbaseAutoConfiguration {
 			.trustManagerFactory(getTrustManagerFactory(this.properties.getEnv().getSsl(), sslBundles)));
 	}
 
+	@SuppressWarnings("removal")
 	private TrustManagerFactory getTrustManagerFactory(CouchbaseProperties.Ssl ssl, SslBundles sslBundles) {
 		if (ssl.getKeyStore() != null) {
 			return loadTrustManagerFactory(ssl);
@@ -140,6 +141,7 @@ public class CouchbaseAutoConfiguration {
 		throw new IllegalStateException("A key store or bundle must be configured when SSL is enabled");
 	}
 
+	@SuppressWarnings("removal")
 	private TrustManagerFactory loadTrustManagerFactory(CouchbaseProperties.Ssl ssl) {
 		String resource = ssl.getKeyStore();
 		try {

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/couchbase/CouchbaseProperties.java

@@ -19,6 +19,7 @@ package org.springframework.boot.autoconfigure.couchbase;
 import java.time.Duration;
 
 import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.boot.context.properties.DeprecatedConfigurationProperty;
 import org.springframework.util.StringUtils;
 
 /**
@@ -177,18 +178,26 @@ public class CouchbaseProperties {
 			this.enabled = enabled;
 		}
 
+		@Deprecated(since = "3.1.0", forRemoval = true)
+		@DeprecatedConfigurationProperty(
+				reason = "SSL bundle support with spring.ssl.bundle and spring.couchbase.env.ssl.bundle should be used instead")
 		public String getKeyStore() {
 			return this.keyStore;
 		}
 
+		@Deprecated(since = "3.1.0", forRemoval = true)
 		public void setKeyStore(String keyStore) {
 			this.keyStore = keyStore;
 		}
 
+		@Deprecated(since = "3.1.0", forRemoval = true)
+		@DeprecatedConfigurationProperty(
+				reason = "SSL bundle support with spring.ssl.bundle and spring.couchbase.env.ssl.bundle should be used instead")
 		public String getKeyStorePassword() {
 			return this.keyStorePassword;
 		}
 
+		@Deprecated(since = "3.1.0", forRemoval = true)
 		public void setKeyStorePassword(String keyStorePassword) {
 			this.keyStorePassword = keyStorePassword;
 		}