[TSLA-10713] convert cloud svg to png for Calico email

[ronanc-tigera]

Product Version(s):

Issue:

Link to docs preview:

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• An SME has approved this change.

DOCS review:

• A member of the docs team has approved this change.

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Merge checklist:

• Deploy preview inspected wherever changes were made
• Build completed successfully
• Test have passed

[netlify]

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Lighthouse	1 paths audited Performance: 67 (🟢 up 1 from production) Accessibility: 98 (no change from production) Best Practices: 92 (no change from production) SEO: 100 (no change from production) PWA: - View the detailed breakdown and full score reports

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[ctauchen]

LGTM