[keymgr, doc] Doc updates for keymgr advance inputs

[ballifatih]

Description

Update the keys and identities doc considering the changes from PR #22878. Further information is provided in the commit.

The changes:

• Use REVISION_SEED only for 1st advance as the first block. CREATOR_ADV_SEED is removed from the first advance call.
• Use CREATOR_ADV_SEED only for 2nd advance as the first block. OWNER_ADV_SEED is removed from the second advance call.
• Use OWNER_ADV_SEED only for 3rd advance as the first block.

The sections and diagrams from the following directories need to be updated:

• doc/security/specs/identities_and_root_keys/
• hw/ip/keymgr/doc/