Add property accessors to ExecutorConfigurationSupport

[lucky8987]

Sometimes I need to check if the ExecutorConfigurationSupport executor has enabled virtual threads, so I added the corresponding getter methods.

[snicoll]

Sometimes I need to check if the ExecutorStructureSupport executor has enabled virtual threads,

Why is that? And why do you need the bean's name?

[lucky8987]

Sometimes I need to check if the ExecutorStructureSupport executor has enabled virtual threads,

Why is that? And why do you need the bean's name?

Because I want to print executor related information on the actuator endpoint, I need to obtain beanName as the key. Of course, this is not necessary, and I can also obtain it through other means.

[snicoll]

@lucky8987 you need to reset your "dev" branch to what you intend to submit in this PR. Right now there are a number of unrelated commits in it.

[lucky8987]

@lucky8987 you need to reset your "dev" branch to what you intend to submit in this PR. Right now there are a number of unrelated commits in it.

Sorry, my other change should not have been submitted here. I have now reset this branch and I really hope that this PR can be merged.