Fix flaky exporter test

[deepthidevaki]

Description

The flaky test failure was not reproducible. But by the failure description, it seems to be a race condition between updating the exported records and verifying the properties. The test was flaky because exporter 1 did not have all expected records. failCount is updated before the record is added to the exportedRecords. So it is possible that the property is asserted too early. To prevent it, wait until the condition is satisfied.

Related issues

closes #11078

[github-actions]

Test Results

   964 files  ±    0     964 suites  ±0   1h 57m 44s ⏱️ + 9m 38s
8 032 tests +348  8 025 ✔️ +348  7 💤 ±0  0 ❌ ±0 
8 238 runs  +348  8 229 ✔️ +348  9 💤 ±0  0 ❌ ±0 

Results for commit e2ed393. ± Comparison against base commit 422d4f6.

[npepinpe]

👍

[deepthidevaki]

bors merge

[zeebe-bors-camunda]

Build succeeded:

• Test summary

[backport-action]

Backport failed for stable/8.0, because it was unable to cherry-pick the commit(s).

Please cherry-pick the changes locally.

git fetch origin stable/8.0
git worktree add -d .worktree/backport-11246-to-stable/8.0 origin/stable/8.0
cd .worktree/backport-11246-to-stable/8.0
git checkout -b backport-11246-to-stable/8.0
ancref=$(git merge-base 422d4f6307a5439f2f017aa0c7e91091799252d1 e2ed3939ed9c4fad3d1e0ae106715229be717aea)
git cherry-pick -x $ancref..e2ed3939ed9c4fad3d1e0ae106715229be717aea

[backport-action]

Backport failed for stable/8.1, because it was unable to cherry-pick the commit(s).

Please cherry-pick the changes locally.

git fetch origin stable/8.1
git worktree add -d .worktree/backport-11246-to-stable/8.1 origin/stable/8.1
cd .worktree/backport-11246-to-stable/8.1
git checkout -b backport-11246-to-stable/8.1
ancref=$(git merge-base 422d4f6307a5439f2f017aa0c7e91091799252d1 e2ed3939ed9c4fad3d1e0ae106715229be717aea)
git cherry-pick -x $ancref..e2ed3939ed9c4fad3d1e0ae106715229be717aea