[dice] Move format_condig_descriptor to diced_open_dice

Test: atest diced_utils_test diced_sample_inputs_test \
diced_test diced_vendor_test diced_open_dice_cbor_test \
diced_client_test
Test: m pvmfw_img microdroid_manager
Test: atest microdroid_manager_test vmbase_example.integration_test
Bug: 267575445

Change-Id: Iba7f775c1d1a3070c119da546edad38c2bbf67ac
11 files changed