NIFI-5821 Add Engine Name to Script Engine Descriptions

[exceptionfactory]

Description of PR

NIFI-5821 Updates the allowable value definitions for the Script Engine property in ExecuteScript and related processors to include the Language Version, Engine Name, and Engine Version in the property description. This approach maintains compatibility with current property value definitions based on Language Name and adds important runtime details about the selected script engine.

For example, with the python Language Name, the associated property description reads as follows:

python 2.7 [jython 2.7.1]

The runtime Java Virtual Machine and supporting libraries drive the associated version numbers.

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[mattyb149]

Reviewing...

[mattyb149]

+1 LGTM, thanks for the improvement! Merging to main