Remove appwrapper yaml

[dimakis]

Issue link

closes #365

What changes have been made

Motivation:
A request to abstract away complexities and to make the SDK the core focus of interaction for users.

• The moving of writing appwrapper to file by attribute passed instead of default.
• .up() now reads the appwrapper from memory instead of opening yaml

Verification steps

Checks

• I've made sure the tests are passing.
• Testing Strategy
  • Unit tests
  • Manual tests
  • Testing is not required for this change

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[dimakis]

@KPostOffice @MichaelClifford @Maxusmusti

The following unit tests fail:

tests/unit_test.py::test_AWManager_creation FAILED
tests/unit_test.py::test_AWManager_submit_remove FAILED

I'm not sure, the test.yaml file is present. can one of you help?