add input data route + tests

[peterdudfield]

Pull Request

Description

add method to update InputDataLastUpdatedSQL from api
The idea is then airflow can call this
#337

How Has This Been Tested?

Added test, and tried locally

• Yes

Checklist:

• My code follows OCF's coding style guidelines
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• I have checked my code and corrected any misspellings

[sentry-io]

Suspect Issues

This pull request was deployed and Sentry observed the following issues:

• ‼️ AssertionError /v0/solar/GB/update_last_data View Issue
• ‼️ ImportError: Install s3fs to access S3 /v0/solar/GB/update_last_data View Issue
• ‼️ FileNotFoundError: nowcasting-sat-development/ecmwf/data/latest/latest.zarr.zip /v0/solar/GB/update_last_data View Issue

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