Port Angular E2E test apps to span streaming

[andreiborza]

Port these E2E test applications to span streaming (5 apps).

angular-19 already has a streamed variant from #23548 and is the reference. The other five are byte-identical to each other apart from the app name, so one port replays across the rest.

Apps

• angular-17
• angular-18
• angular-20
• angular-21
• angular-22

What to do

For each app:

1. Remove the traceLifecycle: 'static' pin added in test(e2e): Disable span streaming in e2e test applications #22590 from src/main.ts. Angular cannot read process.env in the browser bundle, so if a per-variant lifecycle is wanted, follow the fileReplacements approach angular-19 uses.
2. Rewrite tests/performance.test.ts and tests/errors.test.ts from transaction envelopes to span v2:
   • waitForTransaction becomes waitForStreamedSpan / waitForStreamedSpans
   • event.transaction becomes span.name
   • contexts.trace.op becomes getSpanOp(span) plus span.is_segment
   • contexts.trace.data['x'] becomes span.attributes['x'], which has the shape { value, type }
   • transaction_info.source becomes the sentry.segment.name.source attribute
3. The TraceDirective, TraceClass and TraceMethod specs all assert on child spans, so they need collectStreamedSpans rather than a single envelope.

Angular router spans lose their /users/123 name and become Router under streaming (#23547), so those assertions have to change. The pageload and navigation segment names survive, because ResolveEnd renames the root span to the parameterized route.

Reference app: angular-19 (streamed variant). Worked example: #23797.

Keep static trace lifecycle coverage

Before porting this group, duplicate angular-20 as-is into angular-20-static and leave that copy on the current transaction-based specs. That keeps the static trace lifecycle covered once the rest of the group moves to streaming.

The copy is verbatim; only the app name changes:

• package.json -> name
• start-event-proxy.mjs -> proxyServerName
• every waitForTransaction / waitForError / waitForSession call in tests/

Keep traceLifecycle: 'static' in the copy's Sentry.init calls. The e2e matrix discovers apps by directory, so no CI config change is needed.

angular-19 already runs both lifecycles through sentryTest.variants (#23548), so this copy may be redundant for Angular; check that before adding it.

[linear-code]

JS-3495