Adios2StMan row read/write fixes

[rtobar]

This version of casacore should now fix reads/writes by row. Tested locally like so:

import numpy as np
from casacore.tables import table

t = table("/home/rtobar/test.tab", ack=False)

for start, count in ((0, 2), (1, 3), (40, 1), (3, 100)):
    data = t.getcol("REAL")[start: start + count]
    subdata = t.getcol("REAL", startrow=start, nrow=count)
    diff = data - subdata
    if np.all(diff) == 0.0:
        print("good")
    else:
        print(diff)

And it was all good :)

Summary by Sourcery

Fix row-based read and write operations in the Adios2 storage manager and update the build configuration for ADIOS2 support

Bug Fixes:

• Correct handling of startrow and nrow parameters for getcol and putcol in Adios2StMan

Build:

• Update Docker build script to install and configure ADIOS2 dependencies

Tests:

• Verify row-wise slicing of getcol through manual numpy-based tests

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

This PR refactors the Adios2 storage manager to correctly handle row-based reads and writes by fixing offset and count calculations and updates the Docker build to enable ADIOS2 support.

File-Level Changes

Change	Details	Files
Fix row‐based read/write logic in Adios2StMan	Correct calculation of byte offsets using startrow and nrow Ensure read calls request exactly nrow entries instead of full column Update write method to honor row slicing and adjust buffer sizing	casacore/tables/DataManager/Adios2StMan.cc casacore/tables/DataManager/Adios2StMan.h
Enable ADIOS2 support in the Docker build	Install adios2 development package in the Docker image Set CMake flag WITH_ADIOS2=ON when building casacore	docker/build_casacore.docker

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