Display assert to user when --verbose-http-errors not specified

[heifner]

Change Description

• Currently the contract's eosio_assert message is not reported to the user unless --verbose-http-errors is specified to nodeos. For example:

./cleos push action asserter procassert '[0, "hello"]' -p asserter
Error 3050003: eosio_assert_message assertion failure

• This PR adds minimum log_message output so that eosio_assert messages are reported to the user even when --verbose-http-errors is not enabled. For example:

./cleos push action asserter procassert '[0, "hello"]' -p asserter
Error 3050003: eosio_assert_message assertion failure
Error Details:
assertion failure with message: hello

Consensus Changes

None

API Changes

None

Documentation Additions

• Some examples may need to be updated to reflect that assert_message now contains the user assert message.