Add strong consistency check for data on disk

[vibhansa-msft]

✅ What

Data being downloaded by block-cache is saved to local disk, if user choses to enable persistence. This feature is useful if application is reading the same files multiple times and we do not have enough in memory cache to hold all of them. When a block is downloaded it's saved on local disk. There are chances of accidental overwrite on the disk file which might corrupt the data. Later when same block is read by application Blobfuse will load the data from this disk file and end up serving corrupt data to user application.

Having a CRC check on the data when it was downloaded, protects us from those accidental corruptions.

🤔 Why

To provide strong data consistency checks and protect data persisted on local disk.

👩‍🔬 How to validate if applicable

If user choses to persist the downloaded content then this additional flag can provide and extra layer of security.

🔖 Related links

NA

[jainakanksha-msft]

@vibhansa-msft Please add the whole use case to validate the scenario also add the correct links in the PR.

[jainakanksha-msft]

@vibhansa-msft , Do we need to update any public documentation for this new argument?
Additionally, do we need to verify our default config generation script
or any update in E2E test cases?