Add DAITA V2 support for wireguard-go

[dlon]

This PR enables DAITA V2 for all platforms that use wireguard go (except on iOS).

Related PR: mullvad/wireguard-go#18.

Fix DES-1386.

---

This change is 

[linear]

DES-1386 Fetch DAITA machines from gRPC response

[MarkusPettersson98]

Reviewed 11 of 12 files at r1, 3 of 8 files at r2, all commit messages.
Reviewable status: 13 of 18 files reviewed, all discussions resolved

[MarkusPettersson98]

Reviewed 1 of 8 files at r2, 14 of 14 files at r3, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved

---

talpid-tunnel-config-client/src/lib.rs line 249 at r3 (raw file):

        proto::DaitaPlatform::IosWgGo
    }
}

⛏️ Consider re-writing this function using a combination of const and if-else in conjunction with cfg! instead. It will play nicer with people's editors, it is shorter and we can customize the compilation error message 😊

const fn get_platform() -> proto::DaitaPlatform {
    use proto::DaitaPlatform;
    const PLATFORM: DaitaPlatform = if cfg!(windows) {
        DaitaPlatform::WindowsNative
    } else if cfg!(target_os = "linux") {
        DaitaPlatform::LinuxWgGo
    } else if cfg!(target_os = "macos") {
        DaitaPlatform::MacosWgGo
    } else if cfg!(target_os = "android") {
        DaitaPlatform::AndroidWgGo
    } else if cfg!(target_os = "ios") {
        DaitaPlatform::IosWgGo
    } else {
        panic!("This platform does not support DAITA V2!")
    };
    PLATFORM
}

Which results in the following compiler error if we try to compile the crate on a platform where get_platform is not implemented:

error[E0080]: evaluation of constant value failed
   --> talpid-tunnel-config-client/src/lib.rs:234:9
    |
234 |         panic!("This platform does not support DAITA V2!")
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the evaluated program panicked at 'This platform does not support DAITA V2!', talpid-tunnel-config-client/src/lib.rs:234:9
    |
    = note: this error originates in the macro `$crate::panic::panic_2021` which comes from the expansion of the macro `panic` (in Nightly builds, run with -Z macro-backtrace for more info)

note: erroneous constant encountered
   --> talpid-tunnel-config-client/src/lib.rs:236:5
    |
236 |     PLATFORM
    |     ^^^^^^^^

For more information about this error, try `rustc --explain E0080`.
error: could not compile `talpid-tunnel-config-client` (lib) due to 1 previous error
warning: build failed, waiting for other jobs to finish...

Code quote:

#[cfg(all(unix, not(target_os = "ios")))]
fn get_platform() -> proto::DaitaPlatform {
    #[cfg(windows)]
    {
        proto::DaitaPlatform::WindowsNative
    }

    #[cfg(target_os = "linux")]
    {
        proto::DaitaPlatform::LinuxWgGo
    }

    #[cfg(target_os = "macos")]
    {
        proto::DaitaPlatform::MacosWgGo
    }

    #[cfg(target_os = "android")]
    {
        proto::DaitaPlatform::AndroidWgGo
    }

    #[cfg(target_os = "ios")]
    {
        proto::DaitaPlatform::IosWgGo
    }
}

[dlon]

Reviewable status: 17 of 20 files reviewed, all discussions resolved (waiting on @MarkusPettersson98)

---

talpid-tunnel-config-client/src/lib.rs line 249 at r3 (raw file):

Previously, MarkusPettersson98 (Markus Pettersson) wrote…

⛏️ Consider re-writing this function using a combination of const and if-else in conjunction with cfg! instead. It will play nicer with people's editors, it is shorter and we can customize the compilation error message 😊

const fn get_platform() -> proto::DaitaPlatform {
    use proto::DaitaPlatform;
    const PLATFORM: DaitaPlatform = if cfg!(windows) {
        DaitaPlatform::WindowsNative
    } else if cfg!(target_os = "linux") {
        DaitaPlatform::LinuxWgGo
    } else if cfg!(target_os = "macos") {
        DaitaPlatform::MacosWgGo
    } else if cfg!(target_os = "android") {
        DaitaPlatform::AndroidWgGo
    } else if cfg!(target_os = "ios") {
        DaitaPlatform::IosWgGo
    } else {
        panic!("This platform does not support DAITA V2!")
    };
    PLATFORM
}

Which results in the following compiler error if we try to compile the crate on a platform where get_platform is not implemented:

error[E0080]: evaluation of constant value failed
   --> talpid-tunnel-config-client/src/lib.rs:234:9
    |
234 |         panic!("This platform does not support DAITA V2!")
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the evaluated program panicked at 'This platform does not support DAITA V2!', talpid-tunnel-config-client/src/lib.rs:234:9
    |
    = note: this error originates in the macro `$crate::panic::panic_2021` which comes from the expansion of the macro `panic` (in Nightly builds, run with -Z macro-backtrace for more info)

note: erroneous constant encountered
   --> talpid-tunnel-config-client/src/lib.rs:236:5
    |
236 |     PLATFORM
    |     ^^^^^^^^

For more information about this error, try `rustc --explain E0080`.
error: could not compile `talpid-tunnel-config-client` (lib) due to 1 previous error
warning: build failed, waiting for other jobs to finish...

Nice suggestion!

[MarkusPettersson98]

Reviewed 3 of 3 files at r4, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved