Deprecate "Enable SVG Badge support (unauthenticated)" by renaming

[SaberStrat]

Description

Originally planned to be a removal of the switch (#985) (and the feature of removing a globally configurable unauthenticated access to the badges API in Dependency-Track API), after some discussions it was decided to make it a deprecated feature with for the next minor version release of DT, with a planned removal of the feature in the minor release after that.

As this deprecation-change is planned to be removed sooner than later, I'd like to keep the template name as it is, despite it not describing its function in Dependency-Track accurately for the time of the deprecation, to keep the changeload for this deprecation low:

• previously, for enabling support of badges in DT, enable_svg_badge
• this PR, enabling unauthenticated access ot badges in DT, otherwise still supporting the feature but only with authenticated and authorized access, so could've been enable_unauthenticated_svg_badge.

And the ConfigProperty's name in DT modified by this would also remain as it was too for the remainder of the deprecation until removal.

Downstream change of DependencyTrack/dependency-track#4059

Addressed Issue

Closes #1009

Additional Details

Checklist

• I have read and understand the contributing guidelines
• This PR introduces new or alters existing behavior, and I have updated the documentation accordingly