DOC-5266 Aling data migration tool summaries, articles, and attributes

[aimurphy]

• Align data migration tool summaries to minimize redundancy:
  • Compare components - Intro + Data migration tools
  • Phase 2 intro
  • CDM - intro, very slight change
  • DSBulk Migrator - intro, slight change, more planned
  • Use Sideloader with ZDM Proxy
  • FAQ - What tools are available for {product}? and Does the {product} process migrate clusters?
• Remove leading "the" from ZDM Proxy, ZDM Utility, and ZDM Proxy Automation. Instead these tools are just referred to by their names when mentioned generally. See the diff for these trivial changes.
• Change some instances of "ZDM" to "ZDM Proxy" for clarity. See the diff for these trivial changes.

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[plpesvc-ds]

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