Automatic merge from submit-queue (batch tested with PRs 47075, 46342)

Remove hardcode for blocksize, use stat(), fixes test failure on SLES

**What this PR does / why we need it**:
Removes hardcoding for blocksize, fixes test failure on SLES
**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #44022

**Special notes for your reviewer**:

**Release note**:

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