proxy: v2.116.0 (#5102)

This release fixes a minor regression in outbound tap data, where the
source TCP address was omitted.

This release also improves logging:
- uptime formatting is fixed to only display microsecond granularity,
  which fixes formatting/alignment inconsistencies.
- The `off` log level is now special-cased to entirely disable the
  logging subsystem. This can substantially reduce memory usage.

---

* telemetry: Include git SHA in build_info (linkerd/linkerd2-proxy#716)
* outbound: Set source address in Tap metadata (linkerd/linkerd2-proxy#718)
* outbound: test profile search nets filtering (linkerd/linkerd2-proxy#714)
* app: Consolidate metrics types in `core::metrics` (linkerd/linkerd2-proxy#709)
* outbound: test load balancer adding/removing TCP endpoints (linkerd/linkerd2-proxy#717)
* Remove hardcoded list of ports to skip (linkerd/linkerd2-proxy#719)
* admin: Simplify metrics server (linkerd/linkerd2-proxy#720)
* Split tracing init & admin handlers into crate (linkerd/linkerd2-proxy#721)
* tracing: Fix time formatting to ensure alignment (linkerd/linkerd2-proxy#722)
* tracing: Support disabling tracing entirely (linkerd/linkerd2-proxy#723)