feat(bpdm-common): SwaggerUiConfigProperties optional in Landing Page

[SujitMBRDI]

Description

In this pull request, made SwaggerUiConfigProperties optional in LandingPageConfig.

• Updated LandingPageConfig to accept a nullable SwaggerUiConfigProperties dependency
• Added null check in addViewControllers to handle cases where SwaggerUiConfigProperties is not available
• Ensures application can start without requiring SwaggerUiConfigProperties, improving flexibility in test and non-Swagger environments

Pre-review checks

Please ensure to do as many of the following checks as possible, before asking for committer review:

• DEPENDENCIES are up-to-date. Dash license tool. Committers can open IP issues for restricted libs.
• Copyright and license header are present on all affected files