Use java 21 toolchain on whole extractor and set java via release

Toolchain specifies which exact jdk version used for compiling gradle
projects. Using several different toolchains in one repo without any
reason is wastedul. Unifying used jdk will allow to store only one
jdk on dev side. As a side effect unification should make problem
encountered by some users on Matrix (it was tried to solve it
in #12923)

Author: Yevhen Babiichuk (DustDFG)

build.gradle.kts

@@ -14,11 +14,12 @@ allprojects {
 
     tasks.withType<JavaCompile> {
         options.encoding = Charsets.UTF_8.toString()
+		options.release = 11
     }
 
     extensions.configure<JavaPluginExtension> {
         toolchain {
-            languageVersion.set(JavaLanguageVersion.of(11))
+            languageVersion.set(JavaLanguageVersion.of(21))
         }
     }
 }