ci(pie-monorepo): DSW-000 optimise unit-tests job by removing duplicate build step

[siggerzz]

Describe your changes (can list changeset entries if preferable)
Prior to this PR in the unit-tests job, we were doing a build of the packages prior to running the unit tests.

This PR removes this step, as in turbo.json, the build task will be executed already as part of the defined dependsOn, as shown below:

    "test:ci": {
      "cache": true,
      "dependsOn": [
        "build",
        "^test:ci"
      ],
      "outputs": [
        "**/__snapshots__/**",
        "**/snapshots/**"
      ]
    },

It also:

• Removes unused test scripts in package.json
• Ensures pie-icons-react / pie-storybook unit tests run in CI
• Fixes a failing pie-storybook unit test

Before:

After

Author Checklist (complete before requesting a review, do not delete any)

• I have performed a self-review of my code.

Not-applicable Checklist items

Please move any Author checklist items that do not apply to this pull request here.

• I have added thorough tests where applicable (unit / component / visual).
• I have reviewed the PIE Storybook/PIE Docs PR preview.
• I have reviewed visual test updates properly before approving.
• If changes will affect consumers of the package, I have created a changeset entry.
• If a changeset file has been created, I have tested these changes in PIE Aperture using the /test-aperture command.

---

Reviewer checklists (complete before approving)

Mark items as [-] N/A if not applicable.

Reviewer 1

• [-] NA I have reviewed the PIE Storybook/PIE Docs PR preview.
• [-] NA I have verified that all acceptance criteria for this ticket have been completed.
• [-] NA I have reviewed the Aperture changes (if added)
• [-] NA If there are visual test updates, I have reviewed them.

Reviewer 2

• [-] NA I have reviewed the PIE Storybook/PIE Docs PR preview.
• [-] NA I have verified that all acceptance criteria for this ticket have been completed.
• [-] NA I have reviewed the Aperture changes (if added)
• [-] NA If there are visual test updates, I have reviewed them.

[changeset-bot]

🦋 Changeset detected

Latest commit: d97e5cf

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@justeattakeaway/generator-pie-component	Minor

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