[FEATURE REQUEST] Expose invocation to minions

[nf-brentsaner]

Is your feature request related to a problem? Please describe.
There is no way to determine within a state if it was invoked explicitly or via a highstate.

There is also no way for a minion to determine the JID of its current execution.

Describe the solution you'd like
I wish there were a way to determine the state application invocation from a minion.

Perhaps as there is the e.g. salt, opts, grains variables/dictionaries available to SLS files and templates, there could be a new one created: runtime.

This would contain the master-invoked function and args (which is different from e.g. salt['saltutil.is_running'], salt['saltutil.running'], and salt['state.running'] as those do not seem to report how the current job run on a minion was invoked/with what func/args, only for specific states).

This would also contain the JID of the run for easy cross-referencing by an operator with the master.

Describe alternatives you've considered
There are no alternatives that expose this information.

Additional context
N/A

Please Note
If this feature request would be considered a substantial change or addition, this should go through a SEP process here https://github.com/saltstack/salt-enhancement-proposals, instead of a feature request.