Integrity support

[jbaublitz]

Closes #3787

[packit-as-a-service]

Congratulations! One of the builds has completed. 🍾

You can install the built RPMs by following these steps:

• sudo yum install -y dnf-plugins-core on RHEL 8
• sudo dnf install -y dnf-plugins-core on Fedora
• dnf copr enable packit/stratis-storage-stratisd-3790
• And now you can install the packages.

Please note that the RPMs should be used only in a testing environment.

[siteshwar]

OpenScanHub reports a warning:

#     |
#  28 |   ) -> StratisResult<(
#     |  ______^
#  29 | |     HashMap<Device, Vec<(Sectors, Sectors)>>,
#  30 | |     HashMap<Device, Vec<(Sectors, Sectors)>>,
#  31 | | )> {
#     | |__^
#     |
#     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#type_complexity
#     = note: `-D clippy::type-complexity` implied by `-D clippy::all`
#     = help: to override `-D clippy::all` add `#[allow(clippy::type_complexity)]`

Please fix it before merging. Thanks!