consecutive_build_service_disable_threshold option is an inappropriate name in current nova

[Issue]

[compute]consecutive_build_service_disable_threshold option was added by the following patch.

https://review.opendev.org/#/c/463597/

The nova-compute's service record was automatically disabled if we consecutively failed to build a certain number of instances after metging the patch.
At that time consecutive_build_service_disable_threshold was used as threshold.

But, the following patch deleted the feature to automatically disable the service record.

https://review.opendev.org/#/c/572195/

This option's behavior after merging the above patch is this:

* Any positive integer enables reporting build failures.
* Zero to disable reporting build failures.

consecutive_build_service_disable_threshold is used as a boolean value now. There is no difference of behavior between 1 and higher value.
Therefore, I think that consecutive_build_service_disable_"threshold" is an inappropriate name in current nova.

[Improvement idea]

Update the option name.

e.g.
[compute]enable_reporting_of_build_failures