Renumber 4.73.2 migrations (#33376) -> 4.73.2

[JordanMontgomery]

Related issue: None but cf
https://fleetdm.slack.com/archives/C019WG4GH0A/p1758654375623919

No changes file

Renumbering two migrations so they can be released as part of 4.73.2

If some of the following don't apply, delete the relevant line.

• Changes file added for user-visible changes in changes/, orbit/changes/ or ee/fleetd-chrome/changes.
  See Changes
  files for more information.

• Input data is properly validated, SELECT * is avoided, SQL injection is prevented (using placeholders for values in statements)

• If paths of existing endpoints are modified without backwards compatibility, checked the frontend/CLI for any necessary changes

• Added/updated automated tests

• Where appropriate, automated tests simulate multiple hosts and test for host
  isolation (updates to one hosts's records do not affect another)

• QA'd all new/changed functionality manually

For unreleased bug fixes in a release candidate, one of:

• Confirmed that the fix is not expected to adversely impact load test results

• Alerted the release DRI if additional load testing is needed

• Checked table schema to confirm autoupdate

• Checked schema for all modified table for columns that will auto-update timestamps during migration.

• Confirmed that updating the timestamps is acceptable, and will not cause unwanted side effects.

• Ensured the correct collation is explicitly set for character columns (COLLATE utf8mb4_unicode_ci).

[codecov]

Codecov Report

❌ Patch coverage is 66.66667% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 63.22%. Comparing base (699c711) to head (d36f189).
⚠️ Report is 2 commits behind head on rc-patch-fleet-v4.73.2.

Files with missing lines	Patch %	Lines
...s/20250816115553_OptimizeHostScriptResultsIndex.go	66.66%	1 Missing ⚠️
...17154557_AddKernelHostCountsIndexForVulnQueries.go	66.66%	1 Missing ⚠️

Additional details and impacted files

@@                    Coverage Diff                     @@
##           rc-patch-fleet-v4.73.2   #33378      +/-   ##
==========================================================
- Coverage                   63.22%   63.22%   -0.01%     
==========================================================
  Files                        1292     1292              
  Lines                      174390   174390              
==========================================================
- Hits                       110257   110251       -6     
- Misses                      54588    54592       +4     
- Partials                     9545     9547       +2     

Flag	Coverage Δ
backend	63.22% <66.66%> (-0.01%)	⬇️

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[JordanMontgomery]

Vuln test failures expected