[security] Tools/scripts/get-remote-certificate.py is vulnerable to shell code injection

[vstinner]

The Tools/scripts/get-remote-certificate.py script is vulnerable to shell code injection. This vulnerability was reported by Caleb Shortt (@calebshortt).

@calebshortt proposed PR #96014 to fix it.

[vstinner]

Example:

$ ./python Tools/scripts/get-remote-certificate.py 'localhost"||echo 1 > /tmp/marker #:80'
(...)

$ cat /tmp/marker 
1

[vstinner]

I removed mention of CVE-2022-37460: it was withdrawn according to @gpshead.