Updated core-logging DR runbook with some more details

[richgreen-moj]

A reference to the issue / Description of it

#6763

How does this PR fix the problem?

I've tried to update a few details and add a bit more detail around verifying the resources have been created e.g. more functional type checks.

How has this been tested?

Please describe the tests that you ran and provide instructions to reproduce.

{Please write here}

Deployment Plan / Instructions

Will this deployment impact the platform and / or services on it?

{Please write here}

Checklist (check x in [ ] of list items)

• I have performed a self-review of my own code
• All checks have passed
• I have made corresponding changes to the documentation
• Plan and discussed how it should be deployed to PROD (If needed)

Additional comments (if any)

{Please write here}

[github-actions]

Trivy Scan Success

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```hcl

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Trivy will check the following folders:

</details> #### `Checkov Scan` Success
<details><summary>Show Output</summary>

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Checkov will check the following folders:

CTFLint Scan Success

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Setting default tflint config...
Running tflint --init...
Installing "terraform" plugin...
Installed "terraform" (source: github.com/terraform-linters/tflint-ruleset-terraform, version: 0.9.1)
tflint will check the following folders:

Trivy Scan Success

Show Output

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Trivy will check the following folders:

[dms1981]

Looks like something I'd have written. LGTM!