[CI] add sanitizer tests for split rendering

Split rendering is currently not tested with sanitizers, neither in the MR pipelines, nor in the scheduled tests

• MR pipeline: easiest quick solution is to run the existing test (split-rendering-pytest-on-merge-request) with sanitizer build, using the branch build as reference, using --create_ref
• scheduled pipelines: will take more time. Options:
  • Re-use the test from MR pipeline and use --use_ltv option (if supported there - it is there for the external renderer tests)
  • Implement split rendering support in IvasBuildAndRunChecks.py