Previously users would have to keep track of dynamically created CommandPtrs. This adds an ownership-taking version of schedule which places the command in a temporary store in the scheduler. The command will be freed when the command's lifecycle ends.
Inconsistent names were found using the following regular expressions.
* `rg "TEST(_F|_P)?\(\w+,\s+\w+Test\)"`
* `rg "TEST(_F|_P)?\(\w+,\s+Test\w+\)"`
* `rg "TEST(_F|_P)?\(\w+Tests,\s+\w+\)"`
Fixes#3495.
