Parse partial Airflow versions

[BasPH]

Describe the bug

Providing only a major/minor Airflow version fails (with an obfuscated error), and defaults to a rather old Airflow version:

$ astro dev init --airflow-version 2.9
WARNING! There was a network issue getting the latest Astro Runtime image. Your Dockerfile may not contain the latest version
Initializing Astro project
Pulling Airflow development files from Astro Runtime 5.0.1

Turns out you have to specify the full major/minor/patch version:

$ astro dev init --airflow-version 2.9.3
Initializing Astro project
Pulling Airflow development files from Astro Runtime 11.11.0

I would expect different behaviour, e.g. selecting the latest version within Airflow 2.9.*, or a meaningful message that the version cannot be found, or a list of Airflow versions to choose from.

What CLI Version did you experience this bug?
1.29.0

This CLI bug is related to which Astronomer Platform?

• Astro
• Software
• None/Unknown

What Operating System is the above CLI installed on?

🪜 Steps To Reproduce

📸 Screenshots

[robshea-astro]

To be addressed in #1733