bearssl low_write error codes should be also propagated to upper levels as low_read

[bonifaido]

Problem Statement

Otherwise the clients couldn't detect socket close events for example.

Proposed Solution

Please describe what you envision the solution to this problem would look like.

Alternatives Considered

Please briefly describe which alternatives, if any, have been considered, including merits of alternate approaches and tradeoffs being made.

Additional Context

Please provide any other information that may be relevant.