Add US-IL-1, US-MO-1, and US-WA-1 to S3-compatible API datacenter lists

[Copilot]

Three new US datacenters now support the S3-compatible API for network volumes: Illinois (US-IL-1), Missouri (US-MO-1), and Washington (US-WA-1).

Changes:

• Updated datacenter availability table in storage/s3-api.mdx with endpoint URLs for new regions
• Updated datacenter lists in network volume documentation across storage/, pods/storage/, and serverless/storage/ paths
• Maintained alphabetical ordering by datacenter code

Complete US datacenter list:

• US-CA-2, US-IL-1, US-KS-2, US-MO-1, US-WA-1

European datacenters (EUR-IS-1, EU-RO-1, EU-CZ-1) unchanged.

Original prompt

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This section details on the original issue you should resolve

<issue_title>update the lists of S3-compatible network storage to include all new ones</issue_title>
<issue_description>🇪🇺 Europe
• EU-CZ-1 (Czech Republic)
• EU-RO-1 (Romania)
• EUR-IS-1 (Iceland)

🇺🇸 United States
• US-CA-2 (California)
• US-IL-1 (Illinois)
• US-MO-1 (Missouri)
• US-WA-1 (Washington)</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes update the lists of S3-compatible network storage to include all new ones #1

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