CI Snapdragon: Switch ubuntu-latest to ubuntu-slim runner (#22303)

CI Snapdragon: Switch ubuntu-latest to ubuntu-slim runner (#22303)

* switch ubuntu-latest to ubuntu-slim

* Fix the path for upload so CI doesn't fail

* Update .github/workflows/build-and-test-snapdragon.yml

Co-authored-by: Sigbjørn Skjæret <redacted>
* Use -slim image for key check and consistent naming for artifact dir

Signed-off-by: Max Krasnyansky <redacted>
* Remove check-secret extra job

* move QDC key check for Run QDC jobs step specifically

* add a step before to check the secret for qdc jobs

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Signed-off-by: Max Krasnyansky <redacted>
Co-authored-by: Max Krasnyansky <redacted>
Co-authored-by: Sigbjørn Skjæret <redacted>