Environment_Engine: Update AssignSpaceTypeByPoint to provide output of spaces not assigned

[FraserGreenroyd]

Fixes #3179

[FraserGreenroyd]

@BHoMBot check compliance

[bhombot-ci]

@FraserGreenroyd to confirm, the following actions are now queued:

• check code-compliance
• check documentation-compliance
• check project-compliance
• check branch-compliance
• check dataset-compliance
• check copyright-compliance

[Tom-Kingstone]

Went through with Fraser in pair programming session, and works properly as set out.

[Tom-Kingstone]

@BHoMBot check required
@BHoMBot check ready-to-merge

[bhombot-ci]

@Tom-Kingstone to confirm, the following actions are now queued:

• check code-compliance
• check documentation-compliance
• check project-compliance
• check core
• check null-handling
• check serialisation
• check versioning
• check installer
• check ready-to-merge

[bhombot-ci]

The check code-compliance has already been run previously and recorded as a successful check. This check has not been run again at this time.

[bhombot-ci]

The check documentation-compliance has already been run previously and recorded as a successful check. This check has not been run again at this time.

[FraserGreenroyd]

@BHoMBot this is a DevOps instruction. I am requesting neutral checks on: installer, unit-tests, ready-to-merge

[bhombot-ci]

@FraserGreenroyd I have provided neutral checks to the checks requested. These checks will need to be run properly to obtain full results.