Rolled back Viewer to 22.11. Added internal caching.

[vladimir-litvinchik]

This pull request contains two main changes

1. Rolled back Viewer to 22.11 due to significantly decreased performance when rendering PDF files
2. Added internal caching of Viewer instance. Internal caching is enabled by default and can be disabled through configuration

builder.Services
    .AddControllers()
    .AddGroupDocsViewerSelfHostApi(config =>
    {
        config.ConfigureInternalCaching(options =>
        {
            options.DisableInternalCache();
        });
    })

You can also change the internal cache entry lifetime. By default, it is set to 5 minutes.

builder.Services
    .AddControllers()
    .AddGroupDocsViewerSelfHostApi(config =>
    {
        config.ConfigureInternalCaching(options =>
        {
            options.SetCacheEntryExpirationTimeoutMinutes(10); 
        });
    })