Allow for minion failure to respond to job sent in batch mode

[dmurphy18]

What does this PR do?

Allows for failed in data when handling batch mode responses from client, see

salt/salt/client/__init__.py

Lines 1362 to 1374 in f65f953

	if expect_minions:
	for minion in list(minions - found):
	yield {minion: {"failed": True}}
	# Filter out any minions marked as missing for which we received
	# returns (prevents false events sent due to higher-level masters not
	# knowing about lower-level minions).
	missing -= found
	# Report on missing minions
	if missing:
	for minion in missing:
	yield {minion: {"failed": True}}

What issues does this PR fix or reference?

Fixes: #60724

Previous Behavior

In a large environment with 1000s for minions connected to a Master, some commands where causing tracebacks due to key 'ret' not found in data dictionary when processing response to jobs sent.

New Behavior

Now checks for '{"failed": True}' being returned when processing responses to jobs sent in batch mode.

Merge requirements satisfied?

[NOTICE] Bug fixes or features added to Salt require tests.

• Docs
• Changelog - https://docs.saltproject.io/en/master/topics/development/changelog.html
• Tests written

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Yes

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[MKLeb]

Figured I'd review since I've been in this code recently.