Add essl to component manager

[ginkgm]

Moving this component from IDF to extra components, since it's upper layer component.

Tracking ESP-IDF commit: 4f1a9e436e

[ginkgm]

@mahavirj @tore-espressif PTAL

[mahavirj]

@ginkgm Please add entry for this component in .github/workflows/upload_component.yml

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[tore-espressif]

Would it make sense to move tests here too?
e.g. https://github.com/espressif/esp-idf/blob/master/components/driver/test/test_spi_slave_hd.c
https://github.com/espressif/esp-idf/blob/master/components/driver/test/test_sdio.c

We are working on running unit tests in GitHub action, but it is not ready yet. As of now, we only build the tests

EDIT: See #13 . This PR runs test_app on our self-hosted runners

[tore-espressif]

Please rebase on top of #12 , it checks formating in GH action.

And let me know whether you are ready to merge

[tore-espressif]

@ginkgm

Would it make sense to move tests here too?

FYI, #13 was merged and we run tests in GH action now.

[ginkgm]

I think the target-test is too complicated to be in this repo. So I will only add a simple build test, to make sure the component can be build fine.

[igrr]

@ginkgm could you please check the two static analysis warnings reported above?

[tore-espressif]

@ginkgm Thank you for following this up.

I'm haven't worked with essl before, so I can't review properly.
Just make sure that the code compiles with esp-idf master

[ginkgm]

@tore-espressif @kumekay @mahavirj Please merge this MR if it's OK for you. There is basic build test for the source files.

For the compatibilities, I tried with ESP-IDF master examples with slight changes. Those changes will be added to IDF master after this is merged.