Calling vm to get a metric and then preregistering it to avoid
duplication is expensive.
To avoid this we can make a local lookup first which is a map this
quicker. This is a temporary fix
until vm is removed at which point we'll have a single prom_client
registry
Fixes: https://github.com/ledgerwatch/erigon/issues/8558
Should fix the [following
issue](https://discord.com/channels/687972960811745322/738982866670714901/1164291343745568858):
```
git_branch=devel git_tag=v2.52.0-50-g82f1e9f34-dirty git_commit=82f1e9f342ae46d38f41b0561f879f192cdd8fa0
[WARN] [10-18|19:40:19.892] newPayload failed err="rlp: element is larger than containing list"
[WARN] [10-18|19:40:19.892] fail to process block reason="rlp: element is larger than containing list" slot=7569470
```
This introduces _experimental_ RPC daemon run by embedded Silkworm
library. Same notes as in PR #8353 apply here plus the following ones:
- activated if `http` command-line option is enabled and `silkworm.path`
option is present, nothing more is required (i.e. currently, both block
execution and RPC daemon run by Silkworm when specifying
`silkworm.path`, just to keep things as simple as possible)
- only Execution API endpoints are implemented by Silkworm RPCDaemon,
whilst Engine API endpoints are still served by Erigon RPCDaemon
- some features are still missing, in particular:
- state change notification handling
- custom JSON RPC settings (i.e. Erigon RPC settings are not passed to
Silkworm yet)
db must not use "Durable" and "SyncPeriod" in same time
txpool and downloader must be: Durable
nodedb: SafeNoSync+SyncPeriod
because txpool and downloader already can call sync when they need
(txpool after regular flush, downloader after piece download+validation
completion).
Bumps [golang.org/x/net](https://github.com/golang/net) from 0.15.0 to
0.17.0.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="b225e7ca6d"><code>b225e7c</code></a>
http2: limit maximum handler goroutines to MaxConcurrentStreams</li>
<li><a
href="88194ad8ab"><code>88194ad</code></a>
go.mod: update golang.org/x dependencies</li>
<li><a
href="2b60a61f1e"><code>2b60a61</code></a>
quic: fix several bugs in flow control accounting</li>
<li><a
href="73d82efb96"><code>73d82ef</code></a>
quic: handle DATA_BLOCKED frames</li>
<li><a
href="5d5a036a50"><code>5d5a036</code></a>
quic: handle streams moving from the data queue to the meta queue</li>
<li><a
href="350aad2603"><code>350aad2</code></a>
quic: correctly extend peer's flow control window after MAX_DATA</li>
<li><a
href="21814e71db"><code>21814e7</code></a>
quic: validate connection id transport parameters</li>
<li><a
href="a600b3518e"><code>a600b35</code></a>
quic: avoid redundant MAX_DATA updates</li>
<li><a
href="ea633599b5"><code>ea63359</code></a>
http2: check stream body is present on read timeout</li>
<li><a
href="ddd8598e56"><code>ddd8598</code></a>
quic: version negotiation</li>
<li>Additional commits viewable in <a
href="https://github.com/golang/net/compare/v0.15.0...v0.17.0">compare
view</a></li>
</ul>
</details>
<br />
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