OpenSSL 3.x relegated a set of insecure algorithms to a "legacy"
provider which is not loaded by default. Some of these algorithms
have utility beyond encryption such as for hashing, e.g., DES[1]
Add a compile-time option to load the legacy provider in 3.x. When
enabled, also load the default provider because loading any provider
explicitly disables auto-loading the default provider.
[1] https://github.com/vitessio/vitess/blob/9e40015748ede158357bd7291f583db138abc3df/go/vt/vtgate/vindexes/hash.go#L157
Closes GH-13951
Adam Saponara
956c3c2c03