Fix pip-vulnerability fixes in gcsfuse metrics extraction

[raj-prince]

Description

One of the vulnerabilities was to install the python module dependency by enabling the check-sum. Hence, we would need to keep the hash for the pip dependencies.

Steps:

1. Create a requirements.in file with all the python dependency.
2. Use pip-compile requirements.in this will generated requirement.txt with hash.
3. Use pip install --require-hashes -r requirements.txt to install the dependency.

Testing details

1. Manual - Tested manually running the script on GCP machine.
2. Unit tests - NA
3. Integration tests - NA