[FIX] Filter for only ImagingSessions or PhenotypicSessions in SPARQL query

[alyssadai]

• Fixes SPARQL query matches same session too many times due to subclass inferencing #374
• Closes Add submodule checkout step to CI test suite #361

Changes proposed in this pull request:

• Update query template to exclude instances of Session when matching sessions (returned by default due to RDF inferencing based on class relationships)
• Run integration tests using a test graph as part of CI

Checklist

This section is for the PR reviewer

• PR has an interpretable title with a prefix ([ENH], [FIX], [REF], [TST], [CI], [MNT], [INF], [MODEL], [DOC]) (see our Contributing Guidelines for more info)
• PR has a label for the release changelog or skip-release (to be applied by maintainers only)
• PR links to GitHub issue with mention Closes #XXXX
• Tests pass
• Checks pass
• If the PR changes the SPARQL query template, the default Neurobagel query file has also been regenerated

For new features:

• Tests have been added

For bug fixes:

• There is at least one test that would fail under the original bug conditions.

[coveralls]

Pull Request Test Coverage Report for Build 11712481091

Details

• 11 of 11 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.4%) to 97.052%

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Totals
Change from base Build 11672979429:	0.4%
Covered Lines:	823
Relevant Lines:	848

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💛 - Coveralls

[rmanaem]

🧑‍🍳

[neurobagel-bot]

🚀 PR was released in v0.4.2 🚀

[alyssadai]

Note that our public nodes need to be redeployed with this fix.