Migrate Safe Apps endpoint to load directly from CGW

[DaniSomoza]

What it solves

Resolves #3129

Now Safe Apps are loaded directly from CGW.

Removed config-service references.

How this PR fixes it

Now Safe Apps are loaded directly from CGW.

How to test it

1. Go to Safe Apps Section
2. See the network tab in the dev tools
3. The new CGW endpoint should be used to fetch Safe Apps List https://safe-client.staging.gnosisdev.com/v1/chains/{chainId}/safe-apps

Screenshots

Old config-service endpoint

New CGW endpoint

[github-actions]

CLA Assistant Lite All Contributors have signed the CLA.

[github-actions]

ESLint Summary View Full Report

Annotations are provided inline on the Files Changed tab. You can also see all annotations that were generated on the annotations page.

Type	Occurrences	Fixable
Errors	0	0
Warnings	0	0
Ignored	2	N/A

• Result: ✅ success
• Annotations: 0 total

---

^{Report generated by eslint-plus-action}

[coveralls]

Pull Request Test Coverage Report for Build 1606272316

• 2 of 2 (100.0%) changed or added relevant lines in 1 file are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.02%) to 32.227%

---

Files with Coverage Reduction	New Missed Lines	%
src/routes/safe/components/Apps/components/AppCard/index.tsx	1	86.27%

Totals
Change from base Build 1604028580:	-0.02%
Covered Lines:	3094
Relevant Lines:	8511

---

💛 - Coveralls

[github-actions]

Deployment links

🟠 Safe Rinkeby	⚪ Safe Mainnet	🟣 Safe Polygon	🟡 Safe BSC	⚫ Safe Arbitrum	🟢 Safe xDai

[github-actions]

E2E Tests Passed ✅
Check the results here: https://github.com/gnosis/safe-react-e2e-tests/actions/runs/1606297915

[katspaugh]

Not needed?

[DaniSomoza]

Removed! 😓 sorry for that!

[francovenica]

Looks good to me. Just like the snapshot in the description
Tested it in all networks and it works fine.