change in Buttongrid: call create_button_definition in OH4.2

[jimtng]

This is to adapt to the change in core: openhab/openhab-core#4223

A separate PR will be created to add support for the new Button widget

[jimtng]

Note, bundler-multilock 1.3.2 caused a problem with jruby

Fetching bundler-multilock 1.3.2
Installing bundler-multilock 1.3.2
Failed to install plugin `bundler-multilock`, due to
Bundler::Plugin::MalformattedPlugin (RuntimeError: ObjectSpace is disabled;
each_object will only work with Class, pass -X+O to enable)
Error: The process '/home/runner/.rubies/jruby-9.4.7.0/bin/bundle' failed with exit code 29

https://github.com/openhab/openhab-jruby/actions/runs/9177484986/job/25239928255

temporarily sticking with 1.2.x for now. Probably fine using 1.3.1 though.

[jimtng]

removed the commit that dropped bundle-multilock to version 1.2.x because it's now pinned to 1.3.1 in another commit