Make Stebalien a temporary admin to configure issue deletion

[Stebalien]

Summary

Temporary admin privledges for Stebalien to change issue deletion rules.

Why do you need this?

I'd like to configure issue deletion such that all members of the stewards group can delete issues. Otherwise, nobody but owners (as far as I can tell) can delete issues.

What else do we need to know?

I'm proposing we allow issue deletion by both "github-mgmt stewards" and "w3dt-stewards". Any objections?

DRI: myself

Reviewer's Checklist

• It is clear where the request is coming from (if unsure, ask)
• All the automated checks passed
• The YAML changes reflect the summary of the request
• The Terraform plan posted as a comment reflects the summary of the request

[github-actions]

The following access changes will be introduced as a result of applying the plan:

Access Changes

User stebalien:
  - will have the role in the organization change from member to admin

[github-actions]

Before merge, verify that all the following plans are correct. They will be applied as-is after the merge.

Terraform plans

libp2p

Terraform used the selected providers to generate the following execution
plan. Resource actions are indicated with the following symbols:
  ~ update in-place

Terraform will perform the following actions:

  # github_membership.this["stebalien"] will be updated in-place
  ~ resource "github_membership" "this" {
        id       = "libp2p:Stebalien"
      ~ role     = "member" -> "admin"
        # (2 unchanged attributes hidden)
    }

Plan: 0 to add, 1 to change, 0 to destroy.

[galargh]

This totally makes sense, I just enabled that setting for this org. Let me know if you wanted me to do the same for other orgs too, and if you want me to go ahead and merge this PR.

[Stebalien]

Thanks! No point in merging this now.

Let me know if you wanted me to do the same for other orgs too.

Yes please!