G402: Do not fire on safe defaults

[janisz]

Since Go 1.18+ defaults to TLS 1.2, G402 check might be redundant and misleading especially if go.mod specifies version higher than 1.18. We should not see this when tls config uses safe defaults only when it's manually overwritten.

• https://go.dev/doc/go1.18#tls10

• crypto/tls: disable client-side TLS 1.0 and TLS 1.1 golang/go#45428

• https://github.com/stackrox/stackrox/pull/19588/changes