ref: Add no-op streaming span class (#5591)

### Description
We'll use `NoOpStreamedSpan`s for spans that have a negative sampling
decision or were filtered out via `ignore_spans`.

They will get some minimal `__slots__` and `__init__` in a future PR.

#### Issues
<!--
* resolves: #1234
* resolves: LIN-1234
-->

#### Reminders
- Please add tests to validate your changes, and lint your code using
`tox -e linters`.
- Add GH Issue ID _&_ Linear ID (if applicable)
- PR title should use [conventional
commit](https://develop.sentry.dev/engineering-practices/commit-messages/#type)
style (`feat:`, `fix:`, `ref:`, `meta:`)
- For external contributors:
[CONTRIBUTING.md](https://github.com/getsentry/sentry-python/blob/master/CONTRIBUTING.md),
[Sentry SDK development docs](https://develop.sentry.dev/sdk/), [Discord
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Author: sentrivana

sentry_sdk/traces.py

@@ -164,3 +164,45 @@ def trace_id(self) -> str:
             self._trace_id = uuid.uuid4().hex
 
         return self._trace_id
+
+
+class NoOpStreamedSpan(StreamedSpan):
+    def get_attributes(self) -> "Attributes":
+        return {}
+
+    def set_attribute(self, key: str, value: "AttributeValue") -> None:
+        pass
+
+    def set_attributes(self, attributes: "Attributes") -> None:
+        pass
+
+    def remove_attribute(self, key: str) -> None:
+        pass
+
+    @property
+    def status(self) -> "str":
+        return SpanStatus.OK.value
+
+    @status.setter
+    def status(self, status: "Union[SpanStatus, str]") -> None:
+        pass
+
+    @property
+    def name(self) -> str:
+        return ""
+
+    @name.setter
+    def name(self, value: str) -> None:
+        pass
+
+    @property
+    def active(self) -> bool:
+        return True
+
+    @property
+    def span_id(self) -> str:
+        return "0000000000000000"
+
+    @property
+    def trace_id(self) -> str:
+        return "00000000000000000000000000000000"