fix(kotlin-dsl): unable to use events = setOf() in testLogging

[nbrugger-tgm]

Context

It fixes a bug that prevents to use evennts = setOf() which would be the natural approach for Kotlin DSL. (since EnumSet.of() throws an exception on empty sets)

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[tresat]

Thank you for your contribution!

Can you please add some tests to demonstrate and cover your changes? Is there any particular scenario you are looking to support?

[nbrugger-tgm]

Added a unit test.
Its a bug fix so i do not know too well what "particular scenario" i should provide. Using an empty set on the setEvents method (default in kotlin dsl) crashes with a Java internal error from EnumSet.

The reason one wants to set an empty setEvents is when monitoring tests and so on is purely done via test reports (html/xml) and you don't want the "spam" of failed tests in the cli

PS: sorry for the delayed answer

[gitstream-cm]

Change Summary

This PR is 85.71% new code.

Platform	Added Lines	% of Total Line Changes	Deleted Lines	% of Total Line Changes	Files Changed	% of Total Files Changed
bt_ge_build_cache	0	0%	0	0%	0	0%
build_infrastructure	0	0%	0	0%	0	0%
core_configuration	0	0%	0	0%	0	0%
core_execution	0	0%	0	0%	0	0%
core_runtime	0	0%	0	0%	0	0%
documentation	0	0%	0	0%	0	0%
extensibility	0	0%	0	0%	0	0%
gradle_enterprise	0	0%	0	0%	0	0%
ide	0	0%	0	0%	0	0%
jvm	0	0%	0	0%	0	0%
kotlin_dsl	0	0%	0	0%	0	0%
release_coordination	0	0%	0	0%	0	0%
software	6	85.71%	1	14.29%	2	100%

[nbrugger-tgm]

@tresat

[tresat]

@bot-gradle test and merge

[bot-gradle]

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