chore: bump metrics

[shekhirin]

Problem

metrics-process metrics doesn't have a reth_ prefix.

Root cause

metrics-process dependency was updated to latest version in #3988, and with it the metrics dependency made a bump

reth/Cargo.lock

Line 3966 in efab153

"metrics 0.21.1",

while other crates depending on metrics continued to use older version

reth/Cargo.lock

Line 5692 in efab153

"metrics 0.20.1",

The problem with this is that metrics-macro uses the global RECORDER variable which we configure using older version of metrics crate

reth/bin/reth/src/prometheus_exporter.rs

Lines 34 to 38 in efab153

	// Build metrics stack
	Stack::new(recorder)
	.push(PrefixLayer::new("reth"))
	.install()
	.wrap_err("Couldn't set metrics recorder.")?;

but newer version (which metrics-process uses) doesn't see it.

Solution

Use the same version of metrics dependency everywhere, so bump it to latest 0.21.1. The tricky part is this change metrics-rs/metrics#358, which required defining the metrics dependency on the crate level (https://doc.rust-lang.org/reference/paths.html#path-qualifiers).

[codecov]

Codecov Report

Merging #4265 (7a32e44) into main (efab153) will decrease coverage by 0.01%.
The diff coverage is n/a.

Files Changed	Coverage Δ
bin/reth/src/prometheus_exporter.rs	0.00% <ø> (ø)
crates/blockchain-tree/src/metrics.rs	100.00% <ø> (ø)
...tes/consensus/beacon/src/engine/invalid_headers.rs	73.68% <ø> (ø)
crates/consensus/beacon/src/engine/metrics.rs	100.00% <ø> (ø)
crates/net/downloaders/src/metrics.rs	33.33% <ø> (ø)
crates/net/eth-wire/src/p2pstream.rs	80.47% <ø> (+0.16%)	⬆️
crates/net/network/src/metrics.rs	61.53% <ø> (ø)
crates/payload/basic/src/metrics.rs	0.00% <ø> (ø)
crates/payload/builder/src/metrics.rs	18.18% <ø> (ø)
crates/rpc/rpc-builder/src/metrics.rs	100.00% <ø> (+2.00%)	⬆️
... and 5 more

... and 4 files with indirect coverage changes

Flag	Coverage Δ
integration-tests	16.90% <ø> (-0.01%)	⬇️
unit-tests	63.75% <ø> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
reth binary	26.13% <ø> (ø)
blockchain tree	82.56% <ø> (ø)
pipeline	90.07% <ø> (ø)
storage (db)	74.71% <ø> (ø)
trie	94.71% <ø> (ø)
txpool	49.05% <ø> (ø)
networking	77.51% <ø> (-0.02%)	⬇️
rpc	58.64% <ø> (+<0.01%)	⬆️
consensus	63.53% <ø> (ø)
revm	32.15% <ø> (ø)
payload builder	6.82% <ø> (ø)
primitives	86.31% <ø> (ø)