feat(Cesium): Add configuration to optionally disable surface collision detection.

[mdaehnert]

Description

Cesium offers multiple settings for view behavior. One is to allow zooming below surface. It's needed to view elements under the map itself.

Please check if the PR fulfills these requirements

• The commit message follows our guidelines: https://github.com/geosolutions-it/MapStore2/blob/master/CONTRIBUTING.md
• Tests for the changes have been added (for bug fixes / features) -> Single line of code change
• Docs have been added / updated (for bug fixes / features) -> New setting is reflected inside localConfig.json and documented in code.

What kind of change does this PR introduce? (check one with "x", remove the others)

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Other... Please describe:

Issue

What is the current behavior?
Zoom on a 3D map can't go below surface. Disabling the collision would require changing the cesium/Map.jsx module fully.

What is the new behavior?
This PR adds an optional flag to disable collision which can be set by customers via localConfig.json setting.

Breaking change

Does this PR introduce a breaking change? (check one with "x", remove the other)

• Yes, and I documented them in migration notes
• No -> Introducing an optional setting which uses default Cesium value when not set.

Other useful information

• CesiumJS' official documentation about enableCollisionDetection