DOCS-1642 - Add Flex to Tier Migration Report

[JV0812]

Purpose of this pull request

Adds a new documentation page for the Flex to Tier Migration Report under the Partitions section. The page covers:

• Column definitions for all fields in the report
• Recommendation message logic as a decision table (based on Is Included, Unsupported Features Detected, and SIEM Forwarding values)
• FAQ section with 5 Q&As addressing common questions about the report, default scope, SIEM forwarding, monitor/SLO impact, and scan cost reduction

New file: docs/manage/partitions/flex-to-tier-migration-report.md

Select the type of change

• Minor Changes - Typos, formatting, slight revisions
• Update Content - Revisions, updating sections
• New Content - New features, sections, pages, tutorials
• Site and Tools - .clabot, version updates, maintenance, dependencies, new packages for the site (Docusaurus, Gatsby, React, etc.)

Ticket (if applicable)

https://sumologic.atlassian.net/browse/DOCS-1642

[kimsauce]

does this mean any value? or either true or false?

[kimsauce]

does this mean any value? or either true or false?

[kimsauce]

The Column definitions table defines a column called Current Scope, but the Recommendation messages table uses Is Included as its column header. The FAQ then asks "What does the Is Included column mean?" and answers as if it's a column — but "Is Included" is never defined in the Column definitions section. These appear to be the same concept with two different names. One name should be chosen and used consistently throughout.