Update test_mem_leaks.py not to fail on MacOS (#2197)

#### Reference Issues/PRs
<!--Example: Fixes #1234. See also #3456.-->

Currently mem limit on MacOs is shaky and will remove the check there
will remain on Win and Linux

#### What does this implement or fix?

## Change Type (Required)
- [x] **Patch** (Bug fix or non-breaking improvement)
- [ ] **Minor** (New feature, but backward compatible)
- [ ] **Major** (Breaking changes)
- [ ] **Cherry pick**

#### Any other comments?

#### Checklist

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   Checklist for code changes...
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- [ ] Have you updated the relevant docstrings, documentation and
copyright notice?
- [ ] Is this contribution tested against [all ArcticDB's
features](../docs/mkdocs/docs/technical/contributing.md)?
- [ ] Do all exceptions introduced raise appropriate [error
messages](https://docs.arcticdb.io/error_messages/)?
 - [ ] Are API changes highlighted in the PR description?
- [ ] Is the PR labelled as enhancement or bug so it appears in
autogenerated release notes?
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Author: grusev

python/tests/stress/arcticdb/version_store/test_mem_leaks.py

@@ -671,6 +671,7 @@ def test_mem_leak_querybuilder_read_batch_memray(library_with_symbol):
 
     @MEMRAY_TESTS_MARK
     @pytest.mark.limit_memory("490 MB")
+    @pytest.mark.skipif(MACOS, reason="Mac OS mem usage is harder to predicts than WINDOWS")
     def test_mem_limit_querybuilder_read_memray(library_with_symbol):
         """
         The fact that we do not leak memory does not mean that we
@@ -684,6 +685,7 @@ def test_mem_limit_querybuilder_read_memray(library_with_symbol):
 
     @MEMRAY_TESTS_MARK
     @pytest.mark.limit_memory("490 MB")
+    @pytest.mark.skipif(MACOS, reason="Mac OS mem usage is harder to predicts than WINDOWS")
     def test_mem_limit_querybuilder_read_batch_memray(library_with_symbol):
         """
         The fact that we do not leak memory does not mean that we