Generate a new requirements.txt to fix CVEs (#90109)

Hi! Here is a patch for #81859 that fix the vulnerabilities found in
gitpython, cryptography, urllib3 and requests.

I have just regenerated the requirements.txt files running pip-compile
again. Fortunately, this was enough to set all the dependencies on safe
versions.

I have also checked if new vulnerabilities were introduced by running
scorecard on my fork, but none has been introduced.

Thanks!

Signed-off-by: Joyce Brum <joycebrum@google.com>