chore: latest lerna doesn't work anymore with repo (#26279)

On the `v1-main` branch, we install the latest `lerna` when we're trying to do a version bump. Just use the `lerna` from `package.json` instead. The newest one gives this error:

```
lerna notice cli v7.1.1
lerna ERR! ECONFIGWORKSPACES The "useWorkspaces" option has been removed. By default lerna will resolve your packages using your package manager's workspaces configuration. Alternatively, you can manually provide a list of package globs to be used instead via the "packages" option in lerna.json.
```

I need a final successful run of this workflow, because otherwise our GitHub Workflow monitoring infrastructure will endlessly create tickets for the final run it sees, which is failing.

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

.github/workflows/yarn-upgrade-v1main.yml

@@ -36,16 +36,16 @@ jobs:
         run: yarn install --frozen-lockfile
       - name: Install Tools
         run: |-
-          npm -g install lerna npm-check-updates
+          npm -g install npm-check-updates
       - name: Build CLI
-        run: lerna run build --scope aws-cdk --include-dependencies --stream
+        run: npx lerna run build --scope aws-cdk --include-dependencies --stream
       - name: Build Integ Runner
-        run: lerna run build --scope @aws-cdk/integ-runner --include-dependencies --stream
+        run: npx lerna run build --scope @aws-cdk/integ-runner --include-dependencies --stream
       - name: List Mono-Repo Packages
         id: list-packages
         # These need to be ignored from the `ncu` runs!
         run: |-
-          echo "list=$(lerna ls --all --json 2>/dev/null | jq -r 'map(.name) | join(",")')" >> $GITHUB_OUTPUT
+          echo "list=$(npx lerna ls --all --json 2>/dev/null | jq -r 'map(.name) | join(",")')" >> $GITHUB_OUTPUT
       - name: Run "ncu -u"
         # We special-case some @types because they need to be pinned to specific versions due to breaking changes in minor upgrades https://github.com/DefinitelyTyped/DefinitelyTyped/issues/64266
         # We special-case typescript because it's not semantically versioned
@@ -57,8 +57,8 @@ jobs:
           ncu --upgrade --filter=typescript --target=patch
           ncu --upgrade --reject=@types/node,@types/prettier,constructs,typescript,lerna --target=minor
           # Upgrade all the packages
-          lerna exec --parallel ncu -- --upgrade --filter=typescript,lerna --target=patch
-          lerna exec --parallel ncu -- --upgrade --reject='@types/conventional-commits-parser,@types/node,@types/prettier,constructs,typescript,aws-sdk-mock,${{ steps.list-packages.outputs.list }}'  --target=minor
+          npx lerna exec --parallel ncu -- --upgrade --filter=typescript,lerna --target=patch
+          npx lerna exec --parallel ncu -- --upgrade --reject='@types/conventional-commits-parser,@types/node,@types/prettier,constructs,typescript,aws-sdk-mock,${{ steps.list-packages.outputs.list }}'  --target=minor
 
       # This will ensure the current lockfile is up-to-date with the dependency specifications (necessary for "yarn update" to run)
       - name: Run "yarn install"