Hide/Show authentication method in multi data source plugin based on configuration

[bandinib-amzn]

Is your feature request related to a problem? Please describe.

Yes, I wanted to customize authentication methods in multi data source plugin. Sometime I don't need particular auth method to be supported in multi data source plugin because of security or any other concern. I should have flexibility to show only authentication method which I wanted.

Also if there is only one option for selection, make dropdown or selection option read only.

Describe the solution you'd like

Add configuration in yml file and hide/show the auth options based on configuration.

[zengyan-amazon]

in addition to hide/show authentication methods, we only support basic auth(username/password) and static IAM credentials authentication methods. We may consider to make it easier for developers to add other auth methods via plugin, e.g. supporting API key etc.

[bandinib-amzn]

Right now we are supporting No Authentication, Basic Authentication(username/password) and AWS SigV4 (static IAM credentials) authentication methods. Although we propose to add interface in multi data source plugin to register authentication method by plugin in #5692, it would be too many plugins if we decide to move each authentication method in plugins. That's why I feel we should keep existing auth methods as part of core code and provide config options to manage them (hid/show).

I'll mark this issue as follow up item in #5692

[bandinib-amzn]

1. To achieve requested feature, we can add configuration as below:

# Set enabled false to hide authentication method in OpenSearch Dashboards.
# If this setting is commented then all 3 options will be available in OpenSearch Dashboards.
# Default value will be considered to True.
data_source.authTypes:
  NoAuthentication:
    enabled: true
  UsernamePassword:
    enabled: true
  AWSSigV4:
    enabled: true

Please feel free to optimize/modify as per your preference

2. During data_source_management plugin setup, read config values and register authentication methods in auth registry.

3. Refactor below code, to read authentication option from registry.
   

   OpenSearch-Dashboards/src/plugins/data_source_management/public/components/create_data_source_wizard/components/create_form/create_data_source_form.tsx

   Lines 600 to 606 in e08bf30

   	<EuiSuperSelect
   	options={credentialSourceOptions}
   	valueOfSelected={this.state.auth.type}
   	onChange={(value) => this.onChangeAuthType(value)}
   	name="Credential"
   	data-test-subj="createDataSourceFormAuthTypeSelect"
   	/>

4. Add readOnly prop to above super select component. readOnly value should be true if there is only one option in auth registry.

[bandinib-amzn]

@xinruiba Can you take a look at this and help? Thanks!

[xinruiba]

@bandinib-amzn Sure, happy to work on it.

[xinruiba]

The readOnly prop is not works as expected in <EuiSuperSelect>.
https://oui.opensearch.org/1.3/#/forms/super-select

Would you mind to help us understand the expected behavior when readOnly prop is set to true? @kgcreative

Since readOnly is not works, we decide to move forward with the "disabled" prop:

[xinruiba]

This one get completed in PR #5976. We should be able to mark it as complete. @bandinib-amzn . Thanks