Bug#981886: intellij-community-idea build depends on openjdk-8-jdk-headless that will not be in bullseye

[Thomas Uhle]

Dear maintainers,

more recent versions than the one packaged in Debian no longer use 
JDK 1.8 according to README.md that comes bundled with the upstream 
tarballs. Moreover, now it seems to depend on JDK 11 or newer.

Beginning with version 2020.3, the build system relies on JDK 11. The 
newest release of this series was published on Github at 
https://github.com/JetBrains/intellij-community/releases/tag/idea/203.8084.24 .

With version 2022.1, the build system has changed and might need Kotlin. 
So it seems that any version with a release tag between 203.3645.34 (cf. 
https://github.com/JetBrains/intellij-community/releases/tag/idea/203.3645.34 ) 
and 213.7172.25 (most recent version published on March 15th, 2022, cf. 
https://github.com/JetBrains/intellij-community/releases/tag/idea/213.7172.25 ) 
might be suitable to get rid of the JDK 1.8 dependency.

Unfortunately, all these versions require IDEA 2020.1 at least for the 
build process (according to README.md). So an intermediate step might be 
necessary, e.g. building the latest release from the 201.8743 branch (cf. 
https://github.com/JetBrains/intellij-community/releases/tag/idea/201.8743.12 ).

Best regards,

Thomas Uhle