AWS KMS TS Signer (MystenLabs#16139)

## Description 

Describe the changes or additions included in this PR.

## Test Plan 

How did you test the new or updated feature?

---
If your changes are not user-facing and do not break anything, you can
skip the following section. Otherwise, please briefly describe what has
changed under the Release Notes section.

### Type of Change (Check all that apply)

- [ ] protocol change
- [ ] user-visible impact
- [ ] breaking change for a client SDKs
- [ ] breaking change for FNs (FN binary must upgrade)
- [ ] breaking change for validators or node operators (must upgrade
binaries)
- [ ] breaking change for on-chain data layout
- [ ] necessitate either a data wipe or data migration

### Release notes

---------

Co-authored-by: Manolis Liolios <[email protected]>

.changeset/fair-meals-burn.md

@@ -0,0 +1,5 @@
+---
+'@mysten/kms': patch
+---
+
+Introduces @mysten/kms which initially exposes a Sui AWS KMS signer

.github/workflows/turborepo.yml

@@ -19,13 +19,14 @@ jobs:
       - name: Install Nodejs
         uses: actions/setup-node@60edb5dd545a775178f52524783378180af0d1f8 # [email protected]
         with:
-          node-version: '18'
+          node-version: '20'
       - name: Run audit
         run: pnpm audit --prod --audit-level high
 
   build:
     name: Lint, Build, and Test
     runs-on: ubuntu-latest
+    environment: sui-typescript-aws-kms-test-env
     steps:
       - name: Checkout
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # Pin v4.1.1
@@ -37,7 +38,7 @@ jobs:
       - name: Install Nodejs
         uses: actions/setup-node@60edb5dd545a775178f52524783378180af0d1f8 # [email protected]
         with:
-          node-version: '18'
+          node-version: '20'
           cache: 'pnpm'
       - name: Install dependencies
         run: pnpm install --frozen-lockfile
@@ -60,6 +61,12 @@ jobs:
       - name: Build
         run: pnpm turbo build
       - name: Test
+        env:
+          AWS_ACCESS_KEY_ID: ${{ secrets.AWS_KMS_TEST_KEY_ID}}
+          AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_KMS_TEST_SECRET_ACCESS_KEY }}
+          AWS_REGION: ${{ vars.AWS_KMS_AWS_REGION }}
+          AWS_KMS_KEY_ID: ${{ secrets.AWS_KMS_TEST_KMS_KEY_ID }}
+          E2E_AWS_KMS_TEST_ENABLE: "true"
         run: pnpm turbo test
 
       # Pack wallet extension and upload it as an artifact for easy developer use: