⬆️ Update zbus to v5.2.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
zbus	dependencies	minor	5.1.1 -> 5.2.0

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Release Notes

dbus2/zbus (zbus)

v5.2.0: 🔖 zbus 5.2.0

Compare Source

• ⚡️ Optimizations:
  • Don't use proxies in connection code. This allows LTO to remove the proxy-side code from the
    binary if the users isn't directly using proxy APIs. On busd, this reduces the binary size by
    200KB.
  • Disable docs in fdo interface introspection. These interfaces are well-known and documented (in
    the spec itself), so we don't need to provide the docs in the introspection data at runtime.
  • interface now allows disabling docs in introspection. Introspection strings are part of the
    binary and can have an impact on the binary size. This change allows to disable the addition of
    docs in the introspection for cases where there interface is well-known/well-documented. For
    example, combined with the following change of using this in the zbus::fdo interfaces, this
    will allow busd binary to shed 26 KB.
  • Avoid some formatting at runtime in interface macro. Add values already known to the
    introspection XML at compile time. This also removes about 500 bytes from busd binary size.
• 🚩 Add gvariant feature flag to zbus_macros. It's just a proxy feature for zvariant and
  only needed to fix the build in the root workspace when building with --features gvariant.
  #​1125.
• ⬆️ Update tokio-vsock to 0.6.
• 🔊 Skip self in an instrumented method.
• 🔥 Drop now unused sink feature of futures-util.

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