Adding missing property IsVisible property to AdaptiveCardAction

[KoenZomers]

The IsVisible property is missing on the AdaptiveCard causing an update to the adaptivecard using its typed properties to wipe out the action button on the card by having it default back to false visibility. Adding this property in fixes that.

[codecov-commenter]

Codecov Report

Base: 82.42% // Head: 84.08% // Increases project coverage by +1.65% 🎉

Coverage data is based on head (2ab4412) compared to base (63545f3).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #986      +/-   ##
==========================================
+ Coverage   82.42%   84.08%   +1.65%     
==========================================
  Files         416      600     +184     
  Lines       28590    40092   +11502     
==========================================
+ Hits        23565    33710   +10145     
- Misses       5025     6382    +1357     

Impacted Files	Coverage Δ
...re/Model/SharePoint/Changes/Internal/ChangeUser.cs	0.00% <0.00%> (-100.00%)	⬇️
...k/PnP.Core/Model/Teams/Internal/TeamChatMessage.cs	72.34% <0.00%> (-27.66%)	⬇️
...odel/Security/Internal/SharePointUserCollection.cs	78.78% <0.00%> (-21.22%)	⬇️
.../SharePoint/Core/Internal/ContentTypeCollection.cs	84.69% <0.00%> (-15.31%)	⬇️
...PnP.Core.Admin/Model/Teams/Internal/TeamCreator.cs	76.19% <0.00%> (-14.29%)	⬇️
...k/PnP.Core/Model/SharePoint/Core/Internal/Field.cs	80.18% <0.00%> (-12.68%)	⬇️
...e/Model/Teams/Internal/TeamChannelTabCollection.cs	87.92% <0.00%> (-12.08%)	⬇️
.../Model/SharePoint/Core/Internal/ListItemVersion.cs	66.66% <0.00%> (-11.12%)	⬇️
src/sdk/PnP.Core/Services/Core/TestManager.cs	57.14% <0.00%> (-10.76%)	⬇️
.../Model/SharePoint/Core/Internal/SharePointAdmin.cs	83.33% <0.00%> (-10.53%)	⬇️
... and 291 more

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