[BUG][opensearch-dashboards] opensearch_security.cookie.secure is not a valid configuration option

[jpanynines]

Describe the bug
When using the security plugin, the following error is shown in the logs:

{"type":"log","@timestamp":"2024-10-22T02:10:49Z","tags":["fatal","root"],"pid":8,"message":"InvalidConfigurationError: Unknown configuration key(s): \"opensearch_security.cookie.secure\". Check for spelling errors and ensure that expected plugins are installed.\n    at ensureValidConfiguration (/var/vcap/data/packages/opensearch-dashboards/caa6e98035eac8fd70825811ba3a41f635aec962/src/core/server/legacy/config/ensure_valid_configuration.js:50:11)\n    at Server.setup (/var/vcap/data/packages/opensearch-dashboards/caa6e98035eac8fd70825811ba3a41f635aec962/src/core/server/server.js:156:5)\n    at Root.setup (/var/vcap/data/packages/opensearch-dashboards/caa6e98035eac8fd70825811ba3a41f635aec962/src/core/server/root/index.js:60:14)\n    at bootstrap (/var/vcap/data/packages/opensearch-dashboards/caa6e98035eac8fd70825811ba3a41f635aec962/src/core/server/bootstrap.js:113:5)\n    at Command.<anonymous> (/var/vcap/data/packages/opensearch-dashboards/caa6e98035eac8fd70825811ba3a41f635aec962/src/cli/serve/serve.js:192:5) {\n  code: 'InvalidConfig',\n  processExitCode: 64,\n  cause: undefined\n}"}

To Reproduce
Steps to reproduce the behavior:

1. Set the configuration on opensearch_dashboards.yml (here is a snippet of the config file for context):

# Enables SSL and paths to the PEM-format SSL certificate and SSL key files, respectively.
# These settings enable SSL for outgoing requests from the OpenSearch Dashboards server to the browser.
server.ssl.enabled: true
server.ssl.certificate: ***REDACTED***
server.ssl.key: ***REDACTED***


# Optional settings that provide the paths to the PEM-format SSL certificate and key files.
# These files are used to verify the identity of OpenSearch Dashboards to OpenSearch
opensearch.ssl.certificate: ***REDACTED***
opensearch.ssl.key: ***REDACTED***

# Optional setting that enables you to specify a path to the PEM file for the certificate
# authority for your OpenSearch instance.
opensearch.ssl.certificateAuthorities: ["***REDACTED***"]

# To disregard the validity of SSL certificates, change this setting's value to 'none'.
opensearch.ssl.verificationMode: full

opensearch_security.cookie.secure: true

2. Start opensearch-dashboards
3. Check logs for the error

Expected behavior
This configuration option should be valid, as stated in the documentation: https://opensearch.org/docs/latest/install-and-configure/install-dashboards/tls/

OpenSearch Version
2.16

Dashboards Version
2.16

Plugins

os/6dc97238-a182-4cad-b02a-fcd6b59d1357:/var/vcap/packages/opensearch/bin# ./opensearch-plugin list
opensearch-alerting
opensearch-index-management
opensearch-job-scheduler
opensearch-notifications
opensearch-notifications-core
opensearch-security
repository-azure
repository-s3

Host/Environment (please complete the following information):

• OS: Ubuntu Jammy