Add changes to load test Entra conditional access

[lucasmrod]

Changes for load testing #28621.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 18 lines in your changes missing coverage. Please review.

Project coverage is 60.49%. Comparing base (36bf6d9) to head (3afd852). Report is 8 commits behind head on main.

Files with missing lines	Patch %	Lines
cmd/osquery-perf/agent.go	0.00%	18 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #30178 +/- ## ========================================== - Coverage 64.14% 60.49% -3.65% ========================================== Files 1867 1867 Lines 182671 182689 +18 Branches 5334 5334 ========================================== - Hits 117175 110519 -6656 - Misses 56283 63552 +7269 + Partials 9213 8618 -595 ``` | [Flag](https://app.codecov.io/gh/fleetdm/fleet/pull/30178/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=fleetdm) | Coverage Δ | | |---|---|---| | [backend](https://app.codecov.io/gh/fleetdm/fleet/pull/30178/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=fleetdm) | `61.06% <0.00%> (-4.03%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=fleetdm#carryforward-flags-in-the-pull-request-comment) to find out more.

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[sgress454]

Not sure what to make of some of those test failures (maybe need to merge in main?) but code lgtm

[lucasmrod]

Yep. Flaky unrelated tests. Merging.