I’m not sure I fully understand how running subsets of tests will solve a space issue.
But with the app.test target you can specify which test suites or unit tests or even unit test cases to run using the app.test.name property.
app.test.name=unittestcase:[UnitTest].[TestCase]
You can use wildcards with exclusion operators as well that are applied in order:
app.test.name=* !unittestsuite:Exchange
This will run all tests except those found in the exchange suite