ci(asm): appsec_integrations suite improvments [backport 2.17] (#11500)

Backport c60e52d from #11411 to 2.17.

1. Increase parallelism to reduce the time to run the suite, there are
13 riot hashes. Each job takes about 30 minutes, where 10 minutes spent
for building dd-trace-py and the rest spent for running 2 riot hashes.
3. Mark a test flaky, it failed 3 times in a row for an unrelated change
[ci(profiling): explicitly set cpucount for uwsgi
build](#11402), [run
1](https://app.circleci.com/pipelines/github/DataDog/dd-trace-py/77339/workflows/b138b8df-bdb5-4cfc-a6ae-e8d8f204661b/jobs/4357608),
[run
2](https://app.circleci.com/pipelines/github/DataDog/dd-trace-py/77339/workflows/8e33c607-89cb-4bab-89b1-acb6d0931856/jobs/4357577),
[run
3](https://app.circleci.com/pipelines/github/DataDog/dd-trace-py/77339/workflows/b5609072-9b15-4c46-ae11-10c7c0039ada/jobs/4357516).

## Checklist
- [x] PR author has checked that all the criteria below are met
- The PR description includes an overview of the change
- The PR description articulates the motivation for the change
- The change includes tests OR the PR description describes a testing
strategy
- The PR description notes risks associated with the change, if any
- Newly-added code is easy to change
- The change follows the [library release note
guidelines](https://ddtrace.readthedocs.io/en/stable/releasenotes.html)
- The change includes or references documentation updates if necessary
- Backport labels are set (if
[applicable](https://ddtrace.readthedocs.io/en/latest/contributing.html#backporting))

## Reviewer Checklist
- [x] Reviewer has checked that all the criteria below are met 
- Title is accurate
- All changes are related to the pull request's stated goal
- Avoids breaking
[API](https://ddtrace.readthedocs.io/en/stable/versioning.html#interfaces)
changes
- Testing strategy adequately addresses listed risks
- Newly-added code is easy to change
- Release note makes sense to a user of the library
- If necessary, author has acknowledged and discussed the performance
implications of this PR as reported in the benchmarks PR comment
- Backport labels are set in a manner that is consistent with the
[release branch maintenance
policy](https://ddtrace.readthedocs.io/en/latest/contributing.html#backporting)

Co-authored-by: Taegyun Kim <[email protected]>

.circleci/config.templ.yml

@@ -521,7 +521,7 @@ jobs:
 
   appsec_integrations:
     <<: *machine_executor
-    parallelism: 7
+    parallelism: 13
     steps:
       - run_test:
           pattern: 'appsec_integrations'

tests/appsec/integrations/test_flask_entrypoint_iast_patches.py

@@ -1,5 +1,7 @@
 import pytest
 
+from tests.utils import flaky
+
 
 @pytest.mark.subprocess()
 def test_ddtrace_iast_flask_patch():
@@ -146,6 +148,7 @@ def _uninstall_watchdog_and_reload():
         del sys.modules["tests.appsec.iast.fixtures.entrypoint.views"]
 
 
+@flaky(1736035200)
 @pytest.mark.subprocess(check_logs=False)
 def test_ddtrace_iast_flask_app_create_app_patch_all_enable_iast_propagation():
     import dis