DOC-695: rewrite support topic (WIP) [v/5.6]

[devOpsHazelcast]

Backport of #2009

Improve the Get support topic, consolidating info from the Support site with existing info in this topic

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[hyperlint-ai-deprecated]

PR Change Summary

Revised the Get Support topic to enhance clarity and consolidate information for both community and customer support.

• Updated descriptions for community and customer support sections.
• Consolidated information from the Support site into the documentation.
• Improved guidance on submitting support tickets and collecting necessary information.

Modified Files

• docs/modules/getting-started/pages/support.adoc

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