Revert "[Upgrade Assistant] Update UX for 7.17 (#119798)"

[sebelga]

For 7.16 we make some copy changes in UA and removed the reindex (step 2) functionality (#119798).

This PR reverts this work. (34dcc1e)

I've also put back the doc link fix (465eb23). This commit will have to be backported to main.

Note: This PR is currently targeting 7.16 to make the CI pass. Right before merging I will change it to the feature branch remove-deprecations.

[elasticmachine]

Pinging @elastic/kibana-stack-management (Team:Stack Management)

[sebelga]

@elasticmachine merge upstream

[sabarasaba]

Changes lgtm, though it seems that we lost the put back doc link fix commit after the merge upstream 🤔

[sebelga]

Thanks for the review @sabarasaba ! I was also a bit confused for not seeing the "put back doc link fix" commit until I realised that it was already in the target branch 😊 It makes sense, it's been fixed in 7.16

[kibana-ci]

💚 Build Succeeded

• Buildkite Build
• Commit: f6ed96e
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Metrics [docs]

Module Count

Fewer modules leads to a faster build time

id	before	after	diff
upgradeAssistant	140	145	+5

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
upgradeAssistant	127.9KB	138.6KB	+10.7KB

Page load bundle

Size of the bundles that are downloaded on every page load. Target size is below 100kb

id	before	after	diff
upgradeAssistant	18.2KB	18.3KB	+41.0B

History

• 💚 Build #13205 succeeded 12f6bfd
• 💔 Build #13140 failed 465eb23
• 💔 Build #13098 failed d46d222

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@elasticmachine merge upstream