Do not generate dummy originator_cache_guid and random originator_client_item_id in GetUpdatesResponse

[darkdh]

to prevent ReplaceBookmarkNodeGUID from triggering for every updates.
We will see "Update is missing requirements for bookmark position."
error in debug build though but it is ok because we currently don't
rely on UniquePosition to decide bookmark position. And we don't
propagate correct value of these two ids between devices.

Resolves brave/brave-browser#8228

Submitter Checklist:

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
• Verified that these changes build without errors on
  • Android
  • iOS
  • Linux
  • macOS
  • Windows
• Verified that these changes pass automated tests (unit, browser, security tests) on
  • iOS
  • Linux
  • macOS
  • Windows
• Verified that all lint errors/warnings are resolved (npm run lint)
• Ran git rebase master (if needed).
• Ran git rebase -i to squash commits (if needed).
• Tagged reviewers and labelled the pull request as needed.
• Request a security/privacy review as needed.
• Add appropriate QA labels (QA/Yes or QA/No) to include the closed issue in milestone
• Public documentation has been updated as necessary. 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-Protection-Mode
  • 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-issues-with-tracking-protection
  • https://github.com/brave/brave-browser/wiki/QA-Guide

Test Plan:

1. Go to about:flags#brave-sync to enable it on device A and device B
2. Sync device A and device B
3. Create bookmark A1, A2 on device A
4. When they show up on device B
5. Reorder them to be A2, A1 (drag A1 or A2)
6. Changes should be reflected on device A without crash

Reviewer Checklist:

• New files have MPL-2.0 license header.
• Request a security/privacy review as needed.
• Adequate test coverage exists to prevent regressions
• Verify test plan is specified in PR before merging to source

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.

[AlexeyBarabash]

++
I verified test plan for this PR, but I couldn't see the crash with the same steps on master

[darkdh]

I have no STR to reproduce the crash but this is to prevent unnecessary calling ReplaceBookmarkNodeGUID for every updates. And test plan is to make sure it can still apply update and maintain order

[darkdh]

CI failed at Publish xUnit test result report
https://ci.brave.com/job/brave-browser-build-pr/job/replace-bookmark-node-guid-crash/4/execution/node/640/log/
https://ci.brave.com/job/brave-browser-build-pr/job/replace-bookmark-node-guid-crash/4/execution/node/658/log/

Not related to this PR

[LaurenWags]

Verified using

Brave	1.6.30 Chromium: 80.0.3987.106 (Official Build) nightly (64-bit)
Revision	f68069574609230cf9b635cd784cfb1bf81bb53a-refs/branch-heads/3987@{#882}
OS	macOS Version 10.14.6 (Build 18G103)

• Verified test plan from Do not generate dummy originator_cache_guid and random originator_client_item_id in GetUpdatesResponse #4623 (comment)
• Verified dragging both A1 and A2 to reorder bookmarks, no crashes observed
• Verified with folders (F1 and F2) also, no crashes observed

Device A: macOS x64 10.14.6
Device B Ubuntu VM 16.04

Verification passed on

Brave	1.6.31 Chromium: 80.0.3987.106 (Official Build) nightly (64-bit)
Revision	f68069574609230cf9b635cd784cfb1bf81bb53a-refs/branch-heads/3987@{#882}
OS	Ubuntu 18.04 LTS

• Verified test plan from Do not generate dummy originator_cache_guid and random originator_client_item_id in GetUpdatesResponse #4623 (comment)
• Verified dragging both A1 and A2 to reorder bookmarks, no crashes observed

Both Devices: Ubuntu 18.04 LTS