Allow ApplySolutionUpgrade to exit gracefully/skip operation if Upgrade solution does not exist

[parvezghumra]

Power Platform Build Tools Version: 2.0.96
PAC CLI Version: 1.44.2

Currently the Apply Solution Upgrade step fails with an error as follows if an *_Upgrade solution does not exist in the target environment at runtime.

Error: The solution: '{solutionName}' is not found in the target Dataverse organization

If I'm only conditionally importing the corresponding holding solution ahead of this step (eg. based on input pipeline variable values) and/or have set the Skip Lower Version flag to true on the associated Import Solution step that is intended to import the holding solution, there is a possibility that the *_Upgrade solution may not exist in the environment by the time the pipeline run reaches the point of the Apply Upgrade step.

The only way to avoid this error right now is if I build custom logic to check for the existence of the *_Upgrade solution first and only run the Apply Upgrade step if it exists, otherwise skip it. Deployments would be streamlined if this check for existence could be integrated natively into the 'Apply Upgrade` step and the operation exit gracefully if the holding solution does not exist.