It's a common pattern in the create commands to construct a value,
then (if not exporting it) upsert it and wait for it to
reconcile. This commit factors `upsert`, which does the update/insert
bit, and `upsertAndWait`, which does the whole thing.
Since these output messages, they are methods of `apiType` (previously
`names`), so that they have access to the name of the kind they are
operating on.
Signed-off-by: Michael Bridgen <michael@weave.works>
This means all the sub-subcommands can drop the `image-` prefix,
making them shorter and more fluent.
E.g.,
flux create image policy
rather than
flux create auto image-policy
Signed-off-by: Michael Bridgen <michael@weave.works>
