…to Domain implementation.

…eCiphertextBytes

…ShieldedOutput trait

…textBytes, wrapping the AEADBytes in a struct

extended zcash_note_encryption to support variable size notes.

Encryption cleanup

…5_new

This pull request aims to upgrade the `librustzcash` repository to a
version that is specifically compatible with `orchard` v0.5.

To achieve that, the latest updates from the `main` branch of Zcash
team's `librustzcash` GitHub repository have been merged into
`upgrade_for_orchard_v05` branch here, and then merge conflicts have
been resolved. `upgrade_for_orchard_v05` branch was created from
`merge_zcash_980736806` branch that contains previous attempt of
upgading.

Zsa1 is updated to a more current upstream version, commit:
c3eace4

…te (which supports Vanilla and ZSA) - but for now zcash_primitives is not generalised itself and pinned to Vanilla only

…te (which supports Vanilla and ZSA) - but for now zcash_primitives is not generalised itself and pinned to Vanilla only

This PR updates `librustzcash` to accommodate the recent refactoring
changes in the `orchard` crate. The specific changes include:

- Renamed all references from `orchard_flavors` to `orchard_flavor` to
match the new module name.
- Updated the `OrchardDomain` trait references to `OrchardDomainCommon`
to reflect the trait renaming.
- Adjusted the `Bundle` structure to use the fixed `NoteValue` type for
the `burn` field, replacing the previous generic argument.
- Refactored associated code to align with the new structure and naming
conventions in the `orchard` crate.
- Switched from the `orchardzsa-backward-compatibility-0.8.0-ak` to
`orchardzsa-backward-compatibility-0.8.0` branch in `Cargo.toml` to use
the latest version of the `orchard` crate.

---------

Co-authored-by: Dmitry Demin <[email protected]>

)

This PR makes the following changes:
- reordering of the component fields in `read_action` and `write_action`
in issuance in order to make them spec compliant.
- It sets some of the constant values for NU7 in a way that is
consistent with the generated test vectors from the Python reference
implementation (See QED-it/zcash-test-vectors#22
for the changes to the Python reference implementation).
- Some changes are made to function names to reflect the shift from
preparing ZSAs for V7 rather than V6.
- There are changes to the tests to use the `zcash_unstable` flag in
order to cover both ZSA and vanilla Orchard behavior.
- The test vectors are also expanded to include both the V5 vectors, and
the V7 vectors (behind a `zcash_unstable` flag).