Ensure table is not dealocated before all work is done.

[SergioEstevao]

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Fixes PCIOS-

This updates the deinit in Thread dictionary to be async but ensuring that the table is retained until the dealocation is complete.

To test

• CI green should be enough

Checklist

• I have considered if this change warrants user-facing release notes and have added them to CHANGELOG.md if necessary.
• I have considered adding unit tests for my changes.
• I have updated (or requested that someone edit) the spreadsheet to reflect any new or changed analytics.

[danielebogo]

I tun multiple times the tests and I never had a crash now. I left few comments below

[SergioEstevao]

@danielebogo I accepted your suggestion and switched the print to a a log.