Certain operations in `engine/diff` mutate engine events during display.
This mutation can occur concurrently with the serialization of the event
for persistence, which causes a panic in the CLI. These changes fix the
offending code and add code that copies each engine event before
persisteing it in order to guard against future issues.
- Remove `Info` from `Source`. This method was not used.
- Remove `Stack` from `EvalSource`. This method was not used.
- Remove `Type` and `URN` from `Step`. These values are available via
`Res().URN.Type()` and `Res().URN`, respectively. This removes the
possibility of inconsistencies between the type, URN, and state of the
resource associated with a `Step`.
- Remove URN from StepEventMetadata.
* Make `async:true` the default for `invoke` calls (#3750)
* Switch away from native grpc impl. (#3728)
* Remove usage of the 'deasync' library from @pulumi/pulumi. (#3752)
* Only retry as long as we get unavailable back. Anything else continues. (#3769)
* Handle all errors for now. (#3781)
* Do not assume --yes was present when using pulumi in non-interactive mode (#3793)
* Upgrade all paths for sdk and pkg to v2
* Backport C# invoke classes and other recent gen changes (#4288)
Adjust C# generation
* Replace IDeployment with a sealed class (#4318)
Replace IDeployment with a sealed class
* .NET: default to args subtype rather than Args.Empty (#4320)
* Adding system namespace for Dotnet code gen
This is required for using Obsolute attributes for deprecations
```
Iam/InstanceProfile.cs(142,10): error CS0246: The type or namespace name 'ObsoleteAttribute' could not be found (are you missing a using directive or an assembly reference?) [/Users/stack72/code/go/src/github.com/pulumi/pulumi-aws/sdk/dotnet/Pulumi.Aws.csproj]
Iam/InstanceProfile.cs(142,10): error CS0246: The type or namespace name 'Obsolete' could not be found (are you missing a using directive or an assembly reference?) [/Users/stack72/code/go/src/github.com/pulumi/pulumi-aws/sdk/dotnet/Pulumi.Aws.csproj]
```
* Fix the nullability of config type properties in C# codegen (#4379)
* Add the ability to log all engine events to a file.
The path to the file can be specified using the `--event-log` flag to
the CLI. The file will be truncated if it exists. Events are written as
a list of JSON values using the schema described by `pkg/apitype`.
* Expose update engine events to ExtraRuntimeValidation.
Just what it says on the tin. Events from previews are not exposed.
