This PR was squashed before being merged into the 6.3 branch.

Discussion
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[Notifier] Add Smsmode bridge

| Q             | A
| ------------- | ---
| Branch?       | 6.3
| Bug fix?      | no
| New feature?  | yes
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Tickets       |
| License       | MIT
| Doc PR        | symfony/symfony-docs#17511
| Recipe         | symfony/recipes#1161
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Commits
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f5e7500 [Notifier] Add Smsmode bridge