added securityHub alarms KMS multi-Region

[AafAnsari]

A reference to the issue / Description of it

ministryofjustice/modernisation-platform#5635

How does this PR fix the problem?

Added multi-Region KMS keys for DR replication because existing KMS keys are all single-Region and cannot be converted to multi-Region

How has this been tested?

Created and tested primary multi_region KMS key and it's replica in eu-west-1 in sprinkler account

[github-actions]

TFSEC Scan Success

Show Output

```hcl

---

TFSEC will check the following folders:
.

---

Running TFSEC in .
Excluding the following checks: AWS089, AWS099, AWS009, AWS097, AWS018

======================================================
tfsec is joining the Trivy family

tfsec will continue to remain available
for the time being, although our engineering
attention will be directed at Trivy going forward.

You can read more here:
aquasecurity/tfsec#1994

timings
──────────────────────────────────────────
disk i/o 774.085µs
parsing 515.129344ms
adaptation 1.541849ms
checks 3.048002ms
total 520.49328ms

counts
──────────────────────────────────────────
modules downloaded 1
modules processed 6
blocks processed 256
files read 32

results
──────────────────────────────────────────
passed 27
ignored 18
critical 0
high 0
medium 0
low 0

No problems detected!

tfsec_exitcode=0

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

```hcl

*****************************

Checkov will check the following folders:
.

*****************************

Running Checkov in .
Excluding the following checks: CKV_GIT_1
2024-01-30 11:05:44,304 [MainThread  ] [WARNI]  Failed to download module github.com/ministryofjustice/modernisation-platform-terraform-s3-bucket?ref=8688bc15a08fbf5a4f4eef9b7433c5a417df8df1:None (for external modules, the --download-external-modules flag is required)
terraform scan results:

Passed checks: 288, Failed checks: 0, Skipped checks: 85

github_actions scan results:

Passed checks: 132, Failed checks: 0, Skipped checks: 0


checkov_exitcode=0

CTFLint Scan Success

Show Output

*****************************

Setting default tflint config...
Running tflint --init...
Installing "terraform" plugin...
Installed "terraform" (source: github.com/terraform-linters/tflint-ruleset-terraform, version: 0.5.0)
tflint will check the following folders:
.

*****************************

Running tflint in .
tflint_exitcode=0

Trivy Scan

Show Output