Updated error string text for re-joining deleted sync chain case

[AlexeyBarabash]

This is just string text change. Agreed with @rmcfadden3 (discussion)

Resolves brave/brave-browser#28106

Submitter Checklist:

• I confirm that no security/privacy review is needed, or that I have requested one
• There is a ticket for my issue
• Used Github auto-closing keywords in the PR description above
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  • npm run test -- brave_browser_tests, npm run test -- brave_unit_tests wiki
  • npm run lint, npm run presubmit wiki, npm run gn_check, npm run tslint
• Ran git rebase master (if needed)

Reviewer Checklist:

• A security review is not needed, or a link to one is included in the PR description
• New files have MPL-2.0 license header
• Adequate test coverage exists to prevent regressions
• Major classes, functions and non-trivial code blocks are well-commented
• Changes in component dependencies are properly reflected in gn
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• Test plan is specified in PR before merging

After-merge Checklist:

• The associated issue milestone is set to the smallest version that the
  changes has landed on
• All relevant documentation has been updated, for instance:
  • https://github.com/brave/brave-browser/wiki/Deviations-from-Chromium-(features-we-disable-or-remove)
  • https://github.com/brave/brave-browser/wiki/Proxy-redirected-URLs
  • https://github.com/brave/brave-browser/wiki/Fingerprinting-Protections
  • https://github.com/brave/brave-browser/wiki/Brave%E2%80%99s-Use-of-Referral-Codes
  • https://github.com/brave/brave-browser/wiki/Custom-Headers
  • https://github.com/brave/brave-browser/wiki/Web-Compatibility-Exceptions-in-Brave
  • https://github.com/brave/brave-browser/wiki/QA-Guide
  • https://github.com/brave/brave-browser/wiki/P3A

Test Plan:

Please see #13562 (comment) , points C & E, error text should be Could not join this sync chain. The sync chain was deleted.

[samartnik]

lgtm

[kjozwiak]

Verification PASSED on Win 11 x64 using the following build(s):

Brave | 1.50.14 Chromium: 110.0.5481.77 (Official Build) nightly (64-bit)
-- | --
Revision | 65ed616c6e8ee3fe0ad64fe83796c020644d42af-refs/branch-heads/5481@{#839}
OS | Windows 11 Version 22H2 (Build 22621.1194)

Using the STR/Cases mentioned via #17045 (comment), ensured that the correct text/string is being displayed when attempting to add a sync chain that was removed/deleted by the user. Example of the new string:

Also checked https://github.com/brave/brave-core/pull/17045/files and ensured that the correct string is being displayed.

---

Verification PASSED on Pixel 6 running Android 13 using the following build(s):

Brave | 1.50.14 Chromium: 110.0.5481.77 (Official Build) canary (32-bit)
--- | ---
Revision | 65ed616c6e8ee3fe0ad64fe83796c020644d42af-refs/branch-heads/5481@{#839}
OS | Android 13; Build/TQ1A.230105.002

Using the STR/Cases mentioned via #17045 (comment), ensured that the correct text/string is being displayed when attempting to add a sync chain that was removed/deleted by the user. Example of the new string:

Example	Example

Also checked https://github.com/brave/brave-core/pull/17045/files and ensured that the correct string is being displayed.