Add missing annotations on deployments [#28604]

[sudeepgupta90]

closes: #28604
This PR aims to add the annotations to the deployment objects for the following Airflow components:

• Webserver
• Scheduler
• Triggerer
• Flower
• Dags processor
• Pgbouncer
• Worker

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^ Add meaningful description above

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[boring-cyborg]

Congratulations on your first Pull Request and welcome to the Apache Airflow community! If you have any issues or are unsure about any anything please check our Contribution Guide (https://github.com/apache/airflow/blob/main/CONTRIBUTING.rst)
Here are some useful points:

• Pay attention to the quality of your code (flake8, mypy and type annotations). Our pre-commits will help you with that.
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[sudeepgupta90]

The initial workflow failed on a spell check, and I have pushed a correction after verifying this locally.

[potiuk]

LGTM. @jedcunningham @dstandish ?

[boring-cyborg]

Awesome work, congrats on your first merged pull request!

[jedcunningham]

Thanks @sudeepgupta90, congrats on your first commit 🎉