Add sqlserver to infinispan jdbc configurations

[hwo-wd]

• Adds sqlserver JDBC support
• Improved become: yes handling (tested with JDG only)

Variable	Description	Default
infinispan_jdbc_engine	backend database engine (values: ['mariadb','postgres','sqlserver'])	mariadb

[guidograzioli]

Awesome; sorry to say so, but please split in two PRs: database and systemd (keeping the become change together with either of the two). We use the PR link and description to generate the changelog, that's mostly the reason

[guidograzioli]

We are hitting the same linter updates as for keycloak; can you please rebase on main?

[hwo-wd]

Rebased.

[guidograzioli]

Thank you for the contribution! This is going in now