7771e5914d
This reverts commit 6807ed6642.
The reason is that Kotlin compilers until and including version 1.6.10
have code that detects obsolete coroutines via these version
requirements (see `versionAndReleaseCoroutinesMismatch`). Since Kotlin
1.6.10 can read metadata of version 1.7, the earliest we can drop these
version requirements is Kotlin 1.8.0.