IGNITE-22669 Change maven.compiler.source to 11

[timoninmaxim]

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[alex-plekhanov]

If it's a final patch for moving to java 11 we should also:

• Change ./bin files to check correct java version (11 instead of 8, for example ignite.bat/functions.sh)
• Remove java-8 profile from tools/pom.xml
• Remove java8 directory from tools module
• Change JDK verrsion in all Dockerfiles
• Change JDK in deb/rpm packages
• Perhaps clean some code for old java versions (for example, GridCleaner.PRE_JAVA9_CLEANER_CLASS_NAME)
• Fix cpp/dotnet platforms to use java 11
• ...

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[nizhikov]

We still have some links to the older java docs.
Do we want to fix them?