Update to Kotlin 1.8.10#146

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JulianHahn96 wants to merge 5 commits intoKotlin:masterfrom

JulianHahn96:official/kotlin/1.8.10

Commits on Feb 25, 2023

upgrade to Kotlin 1.8.10
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jvm 1.6 not default anymore!
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Commits on Feb 26, 2023

ProjectScriptTemplate as last option. First check user defined templates!
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Make it possible, to actually always build the project for real.
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Commits on Feb 27, 2023

Remove code thats not needed anymore.
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