Add submit_io_batch changes.

[sanebay]

Submit the io batch, which is a mandatory method to be called if read/write are issued with part_of_batch is set to true. In those cases, without this method, IOs might not be even issued. No-op if previous io requests are not part of batch.

[codecov-commenter]

⚠️ Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 80.74%. Comparing base (0b40663) to head (bfa03ba).
Report is 21 commits behind head on main.

Files with missing lines	Patch %	Lines
src/lib/volume_mgr.cpp	0.00%	1 Missing ⚠️

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@             Coverage Diff             @@
##             main      #97       +/-   ##
===========================================
+ Coverage   61.68%   80.74%   +19.05%     
===========================================
  Files          15       17        +2     
  Lines         462      883      +421     
  Branches       35       85       +50     
===========================================
+ Hits          285      713      +428     
+ Misses        158      126       -32     
- Partials       19       44       +25     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[raakella1]

LG