In mongocrypt-marking.c, the functions:

• _mongocrypt_fle2_placeholder_to_insert_update_ciphertext()
• _mongocrypt_fle2_placeholder_to_insert_update_ciphertextForRange()
  will need to be updated to support the v2 payload types.

In particular, the following changes are needed:

• the type of payload changes to mc_FLE2InsertUpdatePayloadV2_t
• the ECCDerivedToken must be replaced by a ServerDerivedFromDataToken
• the computation of EncryptedTokens shall only encrypt the ESCDerivedFromDataAndContentionFactorToken
• set payload.contentionFactor to the randomly generated contention factor
• change calls to payload init/serialize/cleanup with v2 counterparts
• change the final serialized FLE2 subtype to MC_SUBTYPE_FLE2InsertUpdatePayloadV2