Gradle plug-in no longer works w/o the :mergeDiktatReports task

[0x6675636b796f75676974687562]

As of version 1.2.2, the Gradle plug-in requires the :mergeDiktatReports task to be present, even for single-module projects.

This behaviour shouldn't apply in the following cases:

• single-module projects;
• projects where reporter is set to anything but sarif (e.g.: plain).

Observed behavior

C:\project> gradle --continue diktatCheck
FAILURE: Build failed with an exception.

* What went wrong:
Could not determine the dependencies of task ':diktatCheck'.
> Could not create task ':mergeDiktatReports'.
   > Could not create task of type 'SarifReportMergeTask'.
      > Could not generate a decorated class for type SarifReportMergeTask.
         > kotlinx/serialization/SerializationException

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 1s

Steps to Reproduce

Try to run gradle diktatCheck or ./gradlew diktatCheck for either this template project, or any of the Gradle projects under examples/.

Environment information

• diktat version: 1.2.2
• build tool (maven/gradle): Gradle
• link to a project: 0x6675636b796f75676974687562/diktat-demo-gradle