test: fold ten conf setters onto operator_conf_and_argv

[rearden-grok]

Summary

• operator_conf_and_argv now covers ten conf setters that were separate units: the SV2 authority secret file, Debug redaction, key-utils base58check, max_sh_creates and the Esplora template default, the cwd-relative datadir, inbound env absorption, max_inbound versus Core maxconnections, a file blocking store/, the RPC cookie check, and DNS connect hostnames.
• Deletes those ten units. No production behavior change.

Test plan

• cargo test -p rbitcoin-node --lib operator_conf_and_argv
• fmt, clippy -D warnings, deny, ast-grep, workspace tests, ci-os-smoke.sh
• Inverting each operator made operator_conf_and_argv fail; each operator was restored before commit

[rearden-grok]

Rejected. The ten units were pasted into operator_conf_and_argv as their own NodeConfig, temp dir, file, env, and cookie setups. They do not use the argv and conf assembly that journey already builds, so the move does not share setup and does not save work. Leaving the units in place.