[7.17] [ML] Transforms: Update functional test assertion, reenable te…

…sts. (#176920) (#177148)

# Backport

This will backport the following commits from `main` to `7.17`:
- [[ML] Transforms: Update functional test assertion, reenable tests.
(#176920)](#176920)

<!--- Backport version: 9.4.3 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

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Transforms: Update functional test assertion, reenable tests.
(#176920)\n\n## Summary\r\n\r\nFixes #151889\r\nFixes #151811\r\nFixes
#176697\r\nFixes #176698\r\nFixes #176865\r\n\r\nUpdates assertions
after ES snapshot promotion and reenables tests.\r\n\r\n###
Checklist\r\n\r\n- [x] [Unit or
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Transforms: Update functional test assertion, reenable
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Transforms: Update functional test assertion, reenable tests.
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#176697\r\nFixes #176698\r\nFixes #176865\r\n\r\nUpdates assertions
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Transforms: Update functional test assertion, reenable tests.
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#176697\r\nFixes #176698\r\nFixes #176865\r\n\r\nUpdates assertions
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BACKPORT-->

Co-authored-by: Walter Rafelsberger <[email protected]>

x-pack/test/functional/apps/transform/creation_index_pattern.ts

@@ -188,7 +188,7 @@ export default function ({ getService }: FtrProviderContext) {
             {
               chartAvailable: true,
               id: 'customer_full_name',
-              legend: 'top 20 of 3321 categories',
+              legend: 'top 20 of 3327 categories',
               colorStats: [
                 { color: '#000000', percentage: 25 },
                 { color: '#54B399', percentage: 67 },