Add a workaround for loading of the intellij-toml plugin
Add a workaround for loading of the intellij-toml plugin

The current way (since #2213) of loading the intellij-toml plugin
from build.gradle.kts requires a fix for
JetBrains/gradle-intellij-plugin#238.
But the current latest stable version 0.2.18 of gradle-intellij-plugin
does not yet contain this fix.
This causes toml support to not work during development.

Go back to the old way of loading the intellij-toml plugin
until a bugfix version of intellij-toml containing the fix is released.

See JetBrains/gradle-intellij-plugin#258 for more details.

intellij-rust/intellij-rust,Undin/intellij-rust,intellij-rust/intellij-rust,Undin/intellij-rust,Undin/intellij-rust,anton-okolelov/intellij-rust,Undin/intellij-rust,intellij-rust/intellij-rust,anton-okolelov/intellij-rust,anton-okolelov/intellij-rust,intellij-rust/intellij-rust,anton-okolelov/intellij-rust,Undin/intellij-rust,Undin/intellij-rust,intellij-rust/intellij-rust,intellij-rust/intellij-rust,anton-okolelov/intellij-rust