feat(l1): enr strings

[MarcosNicolau]

Motivation
Implements missing support for enr strings when parsing bootnodes and retrieving local enr via admin_nodeInfo

Description

• Adds possibility to construct a Node struct from an enr string
• Adds enr url field in admin_nodeInfo endpoint
• It also fixes the id field in the admin_nodeInfo which is not the actual public key but the keccak256 digest of the public key.

Testing

• Start an el node and send a rpc request to admin_nodeInfo and locate the enr field:

 curl http://localhost:8545 \
  -X POST \
  -H "Content-Type: application/json" \
  --data '{"jsonrpc":"2.0","method":"admin_nodeInfo","params":[],"id":1}'

• Start an ethrex node with the enr string in the bootnodes param:

RUST_LOG=4 cargo run --bin ethrex -- \
    --network test_data/genesis-kurtosis.json \
    --http.port $HTTP_PORT \
    --p2p.port $P2P_PORT \
    --discovery.port $P2P_PORT \
    --bootnodes $BOOTNODES

Note: this pr points to #1823 because it follows the refactor for the BootNodes struct.

Closes #1757

[github-actions]

| File                                                                          | Lines | Diff |
+-------------------------------------------------------------------------------+-------+------+
| /home/runner/work/ethrex/ethrex/cmd/ethrex/ethrex.rs                          | 392   | +7   |
+-------------------------------------------------------------------------------+-------+------+
| /home/runner/work/ethrex/ethrex/crates/common/base64.rs                       | 132   | +132 |
+-------------------------------------------------------------------------------+-------+------+
| /home/runner/work/ethrex/ethrex/crates/common/core.rs                         | 6     | +1   |
+-------------------------------------------------------------------------------+-------+------+
| /home/runner/work/ethrex/ethrex/crates/networking/p2p/types.rs                | 405   | +77  |
+-------------------------------------------------------------------------------+-------+------+
| /home/runner/work/ethrex/ethrex/crates/networking/rpc/admin/mod.rs            | 57    | +11  |
+-------------------------------------------------------------------------------+-------+------+
| /home/runner/work/ethrex/ethrex/crates/networking/rpc/eth/filter.rs           | 548   | +3   |
+-------------------------------------------------------------------------------+-------+------+
| /home/runner/work/ethrex/ethrex/crates/networking/rpc/eth/gas_price.rs        | 121   | -3   |
+-------------------------------------------------------------------------------+-------+------+
| /home/runner/work/ethrex/ethrex/crates/networking/rpc/eth/max_priority_fee.rs | 106   | -3   |
+-------------------------------------------------------------------------------+-------+------+
| /home/runner/work/ethrex/ethrex/crates/networking/rpc/rpc.rs                  | 511   | +58  |
+-------------------------------------------------------------------------------+-------+------+
| /home/runner/work/ethrex/ethrex/crates/networking/rpc/utils.rs                | 277   | +16  |
+-------------------------------------------------------------------------------+-------+------+

Total lines added: +305
Total lines removed: 6
Total lines changed: 311

[mpaulucci]

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