FIO-7623: Fixes an issue where Email action with Logs turned on will fail for the nested form with Attach Submission PDF

[alexandraRamanenka]

Link to Jira Ticket

https://formio.atlassian.net/browse/FIO-7623

Description

What changed?

Because we are calling next() to prevent blocking while sending emails, after the response is sent, req.params are cleared. We already was restoring them after emailer.getParams got resolved, but is some scenariouse, the response is not sent at that moment, so req.params are getting cleared after we restored them. So I adjusted this solution to restore req.params after the response is sent by using 'finish' event.

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Breaking Changes / Backwards Compatibility

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Dependencies

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How has this PR been tested?

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Checklist:

• I have completed the above PR template
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (if applicable)
• My changes generate no new warnings
• My changes include tests that prove my fix is effective (or that my feature works as intended)
• New and existing unit/integration tests pass locally with my changes
• Any dependent changes have corresponding PRs that are listed above