change pendingStepsRequest default queue size

[ettec]

Part of: https://smartcontract-it.atlassian.net/browse/CAPPL-348

Reducing the pendingStepsRequest default queue size in engine.go accounts for 75% in the reduction in memory shown here, (which shoes a ~10 times reductions in memory usage)

https://docs.google.com/spreadsheets/d/1Hw9du-4K5obVLdrbso1nYKMQHDkbAvp8ulWq3wSkY64/edit?usp=sharing

The above results show that reducing the queue size from 100,000 to 1,000 does not have any impact on the workflow latency when running 200 workflows (in fact its a little better but not meaningfully so)

[github-actions]

I see you updated files related to core. Please run pnpm changeset in the root directory to add a changeset as well as in the text include at least one of the following tags:

• #added For any new functionality added.
• #breaking_change For any functionality that requires manual action for the node to boot.
• #bugfix For bug fixes.
• #changed For any change to the existing functionality.
• #db_update For any feature that introduces updates to database schema.
• #deprecation_notice For any upcoming deprecation functionality.
• #internal For changesets that need to be excluded from the final changelog.
• #nops For any feature that is NOP facing and needs to be in the official Release Notes for the release.
• #removed For any functionality/config that is removed.
• #updated For any functionality that is updated.
• #wip For any change that is not ready yet and external communication about it should be held off till it is feature complete.

🎖️ No JIRA issue number found in: PR title, commit message, or branch name. Please include the issue ID in one of these.

[cl-sonarqube-production]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarQube