[8.0] fix (Core): limit read to TLS payload size

[chaen]

2025-02-03 21:04:46 UTC Framework ERROR: Network error while receiving data
Traceback (most recent call last):
  File "/home/chaen/dirac/DIRAC/src/DIRAC/Core/DISET/private/Transports/BaseTransport.py", line 238, in receiveData
    retVal = self._read(pkgSize - readSize, skipReadyCheck=True)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/chaen/dirac/DIRAC/src/DIRAC/Core/DISET/private/Transports/M2SSLTransport.py", line 465, in _read
    read = self.oSocket.read(bufSize)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/chaen/miniforge3/envs/diracprod/lib/python3.11/site-packages/M2Crypto/SSL/Connection.py", line 420, in 
read
    return self._read_bio(size)
           ^^^^^^^^^^^^^^^^^^^^
  File "/home/chaen/miniforge3/envs/diracprod/lib/python3.11/site-packages/M2Crypto/SSL/Connection.py", line 362, in 
_read_bio
    return m2.ssl_read(self.ssl, size, self._timeout)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
OverflowError: in method 'ssl_read', argument 2 of type 'int'

BEGINRELEASENOTES

*Core
FIX: read at most 2^14 bytes at the same time

ENDRELEASENOTES

[DIRACGridBot]

Sweep summary

Sweep ran in https://github.com/DIRACGrid/DIRAC/actions/runs/13133918674

Successful:

• integration