migrate close-stale github action to circleci

[raffaele-oplabs]

Description

Migration from .github/workflows/close-stale.yml to circleci.

• removed .github/workflows/close-stale.yml
• added a circleci workflow that call a custom python script that will implement the same functionality. Script reside in a public repo created for this purpose: https://github.com/ethereum-optimism/circleci-utils
• this workflow will be triggered once a day, and will use a custom github token with limited rights, able to only label/close stale issues/PR.
• Removing tag-service in favor of op-workbench for internal use.

Tests

This has not being fully tested in this repo, but it has being partially tested in another repository.

Additional context

Migration to circleci.

Metadata

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 66.77%. Comparing base (ae78b73) to head (81e929a). Report is 9 commits behind head on develop.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #12928 +/- ## =========================================== - Coverage 68.78% 66.77% -2.02% =========================================== Files 56 56 Lines 4665 4665 =========================================== - Hits 3209 3115 -94 - Misses 1274 1378 +104 + Partials 182 172 -10 ``` | [Flag](https://app.codecov.io/gh/ethereum-optimism/optimism/pull/12928/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ethereum-optimism) | Coverage Δ | | |---|---|---| | [cannon-go-tests-32](https://app.codecov.io/gh/ethereum-optimism/optimism/pull/12928/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ethereum-optimism) | `61.81% <ø> (-2.02%)` | :arrow_down: | | [cannon-go-tests-64](https://app.codecov.io/gh/ethereum-optimism/optimism/pull/12928/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ethereum-optimism) | `56.72% <ø> (-1.66%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ethereum-optimism#carryforward-flags-in-the-pull-request-comment) to find out more. [see 8 files with indirect coverage changes](https://app.codecov.io/gh/ethereum-optimism/optimism/pull/12928/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ethereum-optimism)