batcher: use abstract Queue type for blocks state

[geoknee]

This helps formalise our management of data in the queue, which is important for #12120

Note that the ChannelQueue is not a good candidate for using this new data structure, since we do linear search and removal of arbitrary elements.

[semgrep-app]

Semgrep found 2 golang_fmt_errorf_no_params findings:

• op-chain-ops/deployer/state/intent.go
  • L47 - Triage
  • L63 - Triage

No fmt.Errorf invocations without fmt arguments allowed

_{Ignore this finding from golang_fmt_errorf_no_params.}

[semgrep-app]

Semgrep found 8 golang_fmt_errorf_no_params findings:

• op-e2e/external_geth/main.go
  • L35 - Triage
  • L50 - Triage
  • L53 - Triage
  • L70 - Triage
  • L106 - Triage
  • L137 - Triage
  • L171 - Triage
  • L175 - Triage

No fmt.Errorf invocations without fmt arguments allowed

_{Ignore this finding from golang_fmt_errorf_no_params.}

Semgrep found 3 dangerous-exec-command findings:

• op-e2e/system/e2esys/external.go
  • L111 - Triage
• op-e2e/external_geth/main.go
  • L112-117 - Triage
  • L139-161 - Triage

Detected non-static command inside Command. Audit the input to 'exec.Command'. If unverified user data can reach this call site, this is a code injection vulnerability. A malicious actor can inject a malicious script to execute arbitrary code.

_{Ignore this finding from dangerous-exec-command.}