Integration tests should only test against the min Connect version in the manifest and newer

[cgraham-rs]

Currently every extension runs integration tests against every Connect version we have defined in the integration test makefile.

This was fine when we first released extensions, but moving forward there are likely to be newer extensions that may leverage an API that is only in 2025.07.0 and newer and would otherwise fail if we ran the tests against 2025.06.0 and older. To account for this we should add some logic that reads the extension's manifest and exclude any Connect version older than the defined minimumConnectVersion.

[cgraham-rs]

Dependent on #31716 so we have some other versions to test with