dispatch_minimal should use promise table from Deno.core

[bartlomieju]

Currently we have two different dispatch mechanism implemented:

• minimal - used for io ops (op_read and op_write)
• JSON - used for all other ops

Each of these mechanism has separate promise table that is used to store promises awaiting response from Rust.

Duplication should be removed and only promise table should be managed by Deno.core namespace.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions.