Add tests for large cell logging in Azure Sink

[daveapsgithub]

The Azure Table Sink silently fails when attempting to add more than 64K of data (32K string) to a cell. All subsequent logging also stops working even if this limit is not exceeded.

Added two new test methods to the AzureTableStorageWithPropertiesSinkTests The first test, WhenALoggerWritesToTheSinkAndACellExceeds32KAnExceptionIsRaised, verifies that an exception is thrown when a log entry exceeds the 32K character limit, noting the test is skipped for the Storage Emulator due to its different limit constraints. The second test, WhenALoggerWritesToTheSinkAndACellExceeds32KAnExceptionIsRaisedButSubsequentCallsContinueToWorkAsExpected, checks that after an oversized entry throws an exception, subsequent log entries are processed normally.