soroban-rpc: wildcard filtering, make sure equality works as expected with all the new ScVal structs in getEvents

[tsachiherman]

What ?

soroban-rpc: wildcard filtering, make sure equality works as expected with all the new ScVal structs in getEvents

The equality operator is actually implemented in the go monorepo so the only work required on the soroban-rpc side is updating the unit tests and making sure they still work.

Epic

#471

[2opremio]

@tsachiherman Let me know if you think the work stellar/go#4812 is enough to close this ticket

[tamirms]

@2opremio I think we need to update these tests https://github.com/stellar/soroban-tools/blob/main/cmd/soroban-rpc/internal/methods/get_events_test.go once the xdr files have been updated in the monorepo

[paulbellamy]

ScVal.Equals was fixed in stellar/go#4815, so we just need to update the go.mod and tests and check it in soroban-rpc.