Script decorator: add ability to specify that given script should be active in sleep mode.

[lukaszgo1]

Link to issue number:

None - discovered by @josephsl during his work on #11974

Summary of the issue:

It is impossible to specify that given script should be active in sleep mode for a script decorated with script decorator.

Description of how this pull request fixes the issue:

Script decorator now accepts additional parameter allowInSleepMode which just sets it on the script.
While at it I've also added type hints to the list of its arguments and extended unit test to ensure that allowInSleepMode works.

Testing performed:

I've decorated script which enables/disables sleep mode for a current app and set allowInSlepMode to true ensuring that this script indeed works when in sleep mode. This code isn't in the PR as IMHO it makes sense to merge tis PR first and then perform the actual change as part of #11974.

Known issues with pull request:

None known

Change log entry:

Changes for developers:

• It is now possible to make given script work in sleep mode when using script decorator by specifying allowInSleeepMode in the list of script decorator's
  -arguments.

[josephsl]

Thanks. Blocks PR #11974