Review request for IGNITE-8740: Support reuse of already initialized Ignite in IgniteSpringBean

[Amir Akhmedov]

Hi All,
Can you please review my changes for IGNITE-8740.

PR: https://github.com/apache/ignite/pull/4208
TC:
https://ci.ignite.apache.org/viewLog.html?buildId=1397283&tab=buildResultsDiv&buildTypeId=IgniteTests24Java8_RunAll

Thanks,
Amir