add optional support for tokio-console

[Benjamin-L]

@girlbossceo you may want to copy my tracing branch into your github account to match the other git dependencies. The tracing change that we need is tokio-rs/tracing#2956. I made this PR against the master branch, and don't know how likely it is that it will be backported to the 0.1.x branch by upstream tracing. If not, we might be maintaining the fork for a long time. If we don't want to do this, there are alternative ways to get the LogLevelReloadHandles wrapper to work, but they are ugly.

The refactor of how the reload handle works also enables fixing the current behavior where enabling allow_jaeger or tracing_flame will disable the normal (and sentry) logging, but I'd like to make that change in a separate PR.

[Benjamin-L]

Fixed the first CI failure by downgrading the compile error when you try to combine the tokio_console and release_max_log_level features to a runtime log message. This is a bit unfortunate, but IMO being able to make --all-features builds is useful.

The second CI failure is on dev, and is fixed by #319. If that PR is merged, I'll rebase this branch.

[Benjamin-L]

Huh... I did not expect CI to pass on this branch. The error that I get locally looks like this:

 security::cargo-audit │O│ Crate:     zeroize
 security::cargo-audit │O│ Version:   1.8.0
 security::cargo-audit │O│ Warning:   yanked
 security::cargo-audit │O│ Dependency tree:
 security::cargo-audit │O│ zeroize 1.8.0
 security::cargo-audit │O│ ├── rustls 0.22.4
 security::cargo-audit │O│ │   ├── ureq 2.9.6
 security::cargo-audit │O│ │   │   └── sentry 0.32.3
 security::cargo-audit │O│ │   │       └── conduit 0.3.0
 security::cargo-audit │O│ │   ├── tokio-rustls 0.25.0
 security::cargo-audit │O│ │   │   ├── reqwest 0.12.4
 security::cargo-audit │O│ │   │   │   ├── sentry 0.32.3
 security::cargo-audit │O│ │   │   │   └── conduit 0.3.0
 security::cargo-audit │O│ │   │   └── hyper-rustls 0.26.0
 security::cargo-audit │O│ │   │       └── reqwest 0.12.4
 security::cargo-audit │O│ │   ├── reqwest 0.12.4
 security::cargo-audit │O│ │   └── hyper-rustls 0.26.0
 security::cargo-audit │O│ ├── ed25519-dalek 2.1.1
 security::cargo-audit │O│ │   └── ruma-signatures 0.14.0
 security::cargo-audit │O│ │       └── ruma 0.9.4
 security::cargo-audit │O│ │           └── conduit 0.3.0
 security::cargo-audit │O│ ├── der 0.7.9
 security::cargo-audit │O│ │   ├── spki 0.7.3
 security::cargo-audit │O│ │   │   └── pkcs8 0.10.2
 security::cargo-audit │O│ │   │       ├── ruma-signatures 0.14.0
 security::cargo-audit │O│ │   │       └── ed25519 2.2.3
 security::cargo-audit │O│ │   │           └── ed25519-dalek 2.1.1
 security::cargo-audit │O│ │   └── pkcs8 0.10.2
 security::cargo-audit │O│ └── curve25519-dalek 4.1.2
 security::cargo-audit │O│     └── ed25519-dalek 2.1.1
 security::cargo-audit │O│
 security::cargo-audit │E│ error: 1 denied warning found!

[Benjamin-L]

Rebased on current dev which has the zeroize fix.

[girlbossceo]

If we find ourselves maintaining the tracing fork in a month now, we'll look into alternatives