Add back span status

[sl0thentr0py]

Description

For some reason since Performance was implemented ages ago, we were not sending the span.status field at all.
Add it back since we are moving to a Span-First world and Agent Monitoring also expects span statuses to be correct for some product features.

Some other notes regarding the status mess:

• the transaction status is added to the trace_context - this is fine
• the span status is also added as a tag, this should be removed in a major since it's redundant
• set_http_status further adds another tag called http.status_code, remove this in the major too

Issues

• resolves: Add back span.status #5059
• resolves: PY-1960

[linear]

PY-1960 Add back `span.status`

[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
28638	1	28637	2319

View the top 1 failed test(s) by shortest run time

tests.tracing.test_decorator::test_trace_decorator_no_trx

Stack Traces | 0.05s run time

tests/tracing/test_decorator.py:47: in test_trace_decorator_no_trx
    fake_debug.assert_called_once_with(
.../hostedtoolcache/Python/3.14.0.../x64/lib/python3.14/unittest/mock.py:996: in assert_called_once_with
    raise AssertionError(msg)
E   AssertionError: Expected 'mock' to be called once. Called 7 times.
E   Calls: [call('Cannot create a child span for %s. Please start a Sentry transaction before calling this function.', 'time.sleep'),
E    call('[Monitor] health check negative, downsampling with a factor of %d', 10),
E    call('Cannot create a child span for %s. Please start a Sentry transaction before calling this function.', 'time.sleep'),
E    call('Cannot create a child span for %s. Please start a Sentry transaction before calling this function.', 'time.sleep'),
E    call('[Monitor] health check negative, downsampling with a factor of %d', 10),
E    call('Cannot create a child span for %s. Please start a Sentry transaction before calling this function.', 'time.sleep'),
E    call('Cannot create a child span for %s. Please start a Sentry transaction before calling this function.', 'test_decorator.my_example_function')].

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[sl0thentr0py]

[sl0thentr0py]

major cleanup tracked in #5154