[BUG] FileStreamFactory.GetStream() neglects to dispose of FileStream when not returned

[rtwede]

Version
5.0.21

Describe the bug
When an exception is thrown by FileStreamFactory.GetStream(...) after creating the FileStream, the stream becomes orphaned/unreachable, but is not disposed properly, holding an open handle to the file with no controlled or deterministic way to dispose of it.
This causes conflicts with other calls/processes which may want to manipulate this file after such an exception occurs.

Code to Reproduce
Write a small snippet to isolate your bug and could be possible to our team test. (REQUIRED)

/* given a pre-existing file.db protected with a password different than the one provided  */
try {
  var engineSettings = new EngineSettings { Filename = "file.db", Password="incorrectPassword", ReadOnly=ReadOnly }
  var engine = new LiteEngine(engineSettings);
} catch {
  File.Delete("file.db");  // Will throw access violation due to file already in use in another process.
}

Expected behavior
Disposable objects should always be disposed before going out of scope to ensure they aren't left dangling indefinitely or non-deterministically (until GC).

Screenshots/Stacktrace

Additional context

[rtwede]

Here's the fixed GetStream() method:
`
public Stream GetStream(bool canWrite, bool sequencial)
{
var write = canWrite && (_readonly == false);

var fileMode = _readonly ? System.IO.FileMode.Open : System.IO.FileMode.OpenOrCreate;
var fileAccess = write ? FileAccess.ReadWrite : FileAccess.Read;
var fileShare = write ? FileShare.Read : FileShare.ReadWrite;
var fileOptions = sequencial ? FileOptions.SequentialScan : FileOptions.RandomAccess;

var isNewFile = write && this.Exists() == false;

var stream = new FileStream(_filename,
    fileMode,
    fileAccess,
    fileShare,
    PAGE_SIZE,
    fileOptions);

try
{

    if (isNewFile && _hidden)
    {
        File.SetAttributes(_filename, FileAttributes.Hidden);
    }

    return _password == null || !_useAesStream ? (Stream)stream : new AesStream(_password, stream);
}
catch
{
    stream.Dispose();
    throw;
}

}
`

[JKamsker]

Great! Can you issue a pullrequest for it? Thanks!