How do I suppress Kotlin warnings from Gradle output using command line or local.properties configuration?

Question

I want to suppress Kotlin compiler warnings using either

• Command line switches as input to a single Gradle command
• Device configuration in the file gradle.properties or local.properties

I do not want to check in changed to build.gradle permanently disabling warnings. I know this is possible with kotlinOptions.suppressWarnings = true (see i.e. this answer).

The reason is that I want it to be suppressed only when building from a CI server, where warnings are not relevant to our development process and only causing noise. However when building from a local computer I want me and my peers to see the warnings so that we can act on them.