feat(ethrex): set default --http.api namespaces

[barnabasbusa]

Waiting on ethrex team's approval when to merge this.

Summary

• Add --http.api=eth,net,web3,debug,admin,txpool to the ethrex launcher's default cmd so HTTP RPC exposes the same namespace set we already enable for the other EL clients (geth/reth/besu/erigon/nethermind).

Test plan

• Spin up a devnet with el_type: ethrex and confirm eth_*, net_*, web3_*, debug_*, admin_*, and txpool_* JSON-RPC methods respond over HTTP.

[edg-l]

LGTM

[barnabasbusa]

Should revert default image once a new release is made

[qu0b-reviewer]

🤖 qu0b-reviewer

Looks good — minimal diff (one line), no concerns. The addition aligns with the pattern established by reth_launcher.star (no engine namespace, since ethrex also uses --authrpc on a separate port for the CL↔EL Engine API). 🚀

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_{Reviewed @ 56eb4ede
"Backups are useless. Restores are everything."}