chore(otel): avoid lazy loading workflow package in interceptors

[chris-olszewski]

What was changed

Introduce a new workflow-imports module in the interceptors package the just rexports what is needed by the workflow interceptors. In the package itself these exports are just stubs that throw if they are used.

When bundling the workflow bundle we use NormalModuleReplacementPlugin to swap out this module with one that actually re-exports from @temporalio/workflow.

Why?

A follow up to #1812 overdue to avoid lazy module loading while keeping @temporalio/workflow as an optional dependency.

Checklist

1. Closes N/A

2. How was this tested:
   The OTEL tests continue to pass with spans getting created.

Made a quick test project to show it is okay to not have @temporal/workflow and use the interceptors package up until you attempt to use a Workflow interceptor.

{
  "dependencies": {
    "@temporalio/common": "^1.14.0",
    "@temporalio/interceptors-opentelemetry": "file:/Users/olszewski/tmp/otel_lazy_fix/packages/interceptors-opentelemetry"
  },
  "scripts": {
    "test": "node index.js"
  },
  "type": "module"
}

import { OpenTelemetryWorkflowClientInterceptor, OpenTelemetryInboundInterceptor, OpenTelemetryActivityOutboundInterceptor } from '@temporalio/interceptors-opentelemetry';

try {
  console.log('making client interceptor')
  new OpenTelemetryWorkflowClientInterceptor();
} catch (e) {
  console.error(e);
}
try {
  console.log('making inbound interceptor')
  new OpenTelemetryInboundInterceptor().execute({ headers: {} }, async () => { });
} catch (e) {
  console.error(e);
}
try {
  console.log('making activity outbound')
  new OpenTelemetryActivityOutboundInterceptor();
} catch (e) {
  console.error(e);
}

Result:

> node index.js

making client interceptor
making inbound interceptor
making activity outbound
/Users/olszewski/tmp/my-otel-test/node_modules/.pnpm/@temporalio+interceptors-opentelemetry@file+..+otel_lazy_fix+packages+interceptors-open_4ed1001953f3d7991853514bfcd75c4a/node_modules/@temporalio/interceptors-opentelemetry/lib/workflow/workflow-imports.js:18
    throw new common_1.IllegalStateError('Workflow uninitialized');
          ^

IllegalStateError: Workflow uninitialized
    at getActivator (/Users/olszewski/tmp/my-otel-test/node_modules/.pnpm/@temporalio+interceptors-opentelemetry@file+..+otel_lazy_fix+packages+interceptors-open_4ed1001953f3d7991853514bfcd75c4a/node_modules/@temporalio/interceptors-opentelemetry/lib/workflow/workflow-imports.js:18:11)
    at OpenTelemetryInboundInterceptor.execute (/Users/olszewski/tmp/my-otel-test/node_modules/.pnpm/@temporalio+interceptors-opentelemetry@file+..+otel_lazy_fix+packages+interceptors-open_4ed1001953f3d7991853514bfcd75c4a/node_modules/@temporalio/interceptors-opentelemetry/lib/workflow/index.js:67:50)
    at file:///Users/olszewski/tmp/my-otel-test/index.js:11:41
    at ModuleJob.run (node:internal/modules/esm/module_job:345:25)
    at async onImport.tracePromise.__proto__ (node:internal/modules/esm/loader:651:26)
    at async asyncRunEntryPointWithESMLoader (node:internal/modules/run_main:117:5)

3. Any docs updates needed?
   N/A