GH-4978 Index geosparql points using geo field

[ate47]

GitHub issue resolved: #4978

Briefly describe the changes proposed in this PR:

I added the indexing of the points using the geo prefix and not only the point prefix.

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PR Author Checklist (see the contributor guidelines for more details):

• my pull request is self-contained
• I've added tests for the changes I made
• I've applied code formatting (you can use mvn process-resources to format from the command line)
• I've squashed my commits where necessary
• every commit message starts with the issue number (GH-xxxx) followed by a meaningful description of the change

[ate47]

I want to mention that this PR is only fixing the Q1 case in #4978.

[hmottestad]

I've create a duplicate issue so that we don't forget about Q2: #4996