JCSMP properties providers for new SolaceIO write connector

[iht]

This adds a base class and two providers for the new SolaceIO write connector. The basic authentication provider just uses a username and password.

Users can write their own providers to set authentication mechanisms and other session properties, by extending from the base class. As an example, we provide a GoogleCloudSecretProvider, to show how to create your own. This provider can also be used "as is", but it is mainly meant as an example to implement your own.

In upcoming PRs, I will be submitting the rest of the write connector. It is thousands of lines of code, so I am splitting in smaller PRs, to facilitate code reviews.

All these PRs are part of the SolaceIO Write feature request #31905

GitHub Actions Tests Status (on master branch)

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