fix: add an option that suppresses eszip migration warning

[nyannyacha]

What kind of change does this PR introduce?

Enhancement

Description

Adds an option to suppress the warning added in #581.

Usage:

await EdgeRuntime.userWorkers.create({
  servicePath,
  // ..snip..
  context: {
    suppressEszipMigrationWarning: true // 👈
  }
});