Upgrade to Testcontainers 1.21.0

Closes gh-45276

Author: snicoll

spring-boot-project/spring-boot-dependencies/build.gradle

@@ -2454,7 +2454,7 @@ bom {
 			releaseNotes("https://github.com/xerial/sqlite-jdbc/releases/tag/{version}")
 		}
 	}
-	library("Testcontainers", "1.20.6") {
+	library("Testcontainers", "1.21.0") {
 		group("org.testcontainers") {
 			bom("testcontainers-bom")
 		}

spring-boot-project/spring-boot-testcontainers/src/dockerTest/java/org/springframework/boot/testcontainers/service/connection/otlp/GrafanaOpenTelemetryMetricsContainerConnectionDetailsFactoryIntegrationTests.java

@@ -76,7 +76,7 @@ void connectionCanBeMadeToOpenTelemetryCollectorContainer() {
 			.untilAsserted(() -> {
 				Response response = RestAssured.given()
 					.queryParam("query", "{job=\"test\"}")
-					.get("%s/api/v1/query".formatted(container.getPromehteusHttpUrl()))
+					.get("%s/api/v1/query".formatted(container.getPrometheusHttpUrl()))
 					.prettyPeek()
 					.thenReturn();
 				assertThat(response.getStatusCode()).isEqualTo(200);

spring-boot-project/spring-boot-testcontainers/src/main/java/org/springframework/boot/testcontainers/service/connection/ldap/LLdapContainerConnectionDetailsFactory.java

@@ -61,7 +61,7 @@ public String getUsername() {
 
 		@Override
 		public String getPassword() {
-			return getContainer().getUserPass();
+			return getContainer().getPassword();
 		}
 
 	}