### CI Link

https://gradle-enterprise.elastic.co/s/jze725jpxi7ki/console-log?task=:x-pack:plugin:security:internalClusterTest

### Repro line

./gradlew ':x-pack:plugin:security:internalClusterTest' --tests "org.elasticsearch.xpack.security.authc.pki.PkiAuthDelegationIntegTests.testDelegateThenAuthenticate" -Dtests.seed=F5EC1FEFFC2FC08B -Dtests.locale=en-GB -Dtests.timezone=SystemV/PST8PDT -Druntime.java=20

### Does it reproduce?

Yes

### Applicable branches

main

### Failure history

_No response_

### Failure excerpt

The pki integ test began failing today. Looking at the certs the test uses, they are all expired:

```
❯ openssl x509 -enddate -noout -in testClient.crt
notAfter=Jul 18 13:33:41 2023 GMT
❯ openssl x509 -enddate -noout -in testIntermediateCA.crt
notAfter=Jul 18 13:32:34 2023 GMT
❯ openssl x509 -enddate -noout -in testRootCA.crt
notAfter=Jul 18 13:32:20 2023 GMT
```
x-pack/plugin/security/src/internalClusterTest/java/org/elasticsearch/xpack/security/authc/pki/PkiAuthDelegationIntegTests.java
}
            }
            """;
        securityClient.putRoleMapping("role_by_delegated_realm", roleMapping);
        
        var delegatePkiResponse = getSecurityClient(testUserOptions).delegatePkiAuthentication(certificateChain);
        
        TestSecurityClient accessTokenClient = getSecurityClient(
            RequestOptions.DEFAULT.toBuilder().addHeader("Authorization", "Bearer " + delegatePkiResponse.v1()).build()
        );
        final Map<String, Object> authenticateResponse = accessTokenClient.authenticate();
        assertThat(authenticateResponse, hasEntry(Fields.USERNAME.getPreferredName(), "Elasticsearch Test Client"));
        final Map<String, Object> metadata = assertMap(authenticateResponse, Fields.METADATA);
        assertThat(metadata, hasEntry("pki_dn", "O=org, OU=Elasticsearch, CN=Elasticsearch Test Client"));
        assertThat(metadata, hasEntry("pki_delegated_by_user", "test_user"));
        assertThat(metadata, hasEntry("pki_delegated_by_realm", "file"));
        
        List<?> roles = assertList(authenticateResponse, Fields.ROLES);
        assertThat(roles, containsInAnyOrder("role_by_delegated_user", "role_by_delegated_realm"));
        Map<String, Object> realm = assertMap(authenticateResponse, Fields.AUTHENTICATION_REALM);
        assertThat(realm, hasEntry(Fields.REALM_NAME.getPreferredName(), "pki3"));
        assertThat(realm, hasEntry(Fields.REALM_TYPE.getPreferredName(), "pki"));
        assertThat(authenticateResponse, hasEntry(Fields.AUTHENTICATION_TYPE.getPreferredName(), "token"));
        
        securityClient.deleteRoleMapping("role_by_delegated_user");
        securityClient.deleteRoleMapping("role_by_delegated_realm");
    }
    public void testIncorrectCertChain() throws Exception {
        X509Certificate clientCertificate = readCertForPkiDelegation("testClient.crt");
        X509Certificate intermediateCA = readCertForPkiDelegation("testIntermediateCA.crt");