…al usages

* 6.4:
  Replace __sleep/wakeup() by __(un)serialize() for throwing and internal usages

…ner` (andrew-demb)

This PR was squashed before being merged into the 7.3 branch.

Discussion
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[Mailer] Fix memory leak with `mailer.message_logger_listener`

| Q             | A
| ------------- | ---
| Branch?       | 7.3
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Issues        | Fix #50580
| License       | MIT

Register `mailer.message_logger_listener` only when profiler enabled to prevent memory leaks as suggested in:
- symfony/symfony#50580 (comment)
- symfony/symfony#50580 (comment)

~~`@stof` can you guide me about the way how to implement your second suggestion too? symfony/symfony#50580 (comment) UPD: resolved

_This change may be considered as a minor BC break - DI service won't be available anymore with disabled profiler._

Commits
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b63317d2cf6 [Mailer] Fix memory leak with `mailer.message_logger_listener`