feat(streams): Streams API

[andersfylling]

Summary

Add streams api to sdk.

Example

from cognite.client import CogniteClient
from cognite.client.data_classes.data_modeling.streams import StreamDeleteItem, StreamWrite

client = CogniteClient(...)  # your usual ClientConfig / credentials

external_id = "my_stream"
client.data_modeling.streams.create([StreamWrite(external_id, {"template": {"name": "ImmutableTestStream"}})])
client.data_modeling.streams.list()
client.data_modeling.streams.retrieve(external_id)
client.data_modeling.streams.delete([StreamDeleteItem(external_id)])

This PR does not add the Records API (#2535).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.48%. Comparing base (ef5ac04) to head (02d53d4).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2534      +/-   ##
==========================================
+ Coverage   93.43%   93.48%   +0.05%     
==========================================
  Files         478      484       +6     
  Lines       48230    48488     +258     
==========================================
+ Hits        45062    45331     +269     
+ Misses       3168     3157      -11     

Files with missing lines	Coverage Δ
cognite/client/_api/streams/__init__.py	100.00% <100.00%> (ø)
cognite/client/_cognite_client.py	92.72% <100.00%> (+0.13%)	⬆️
cognite/client/_sync_api/streams/__init__.py	100.00% <100.00%> (ø)
cognite/client/_sync_cognite_client.py	91.42% <100.00%> (+0.16%)	⬆️
cognite/client/data_classes/__init__.py	100.00% <100.00%> (ø)
cognite/client/data_classes/streams/__init__.py	100.00% <100.00%> (ø)
cognite/client/data_classes/streams/stream.py	100.00% <100.00%> (ø)
cognite/client/testing.py	100.00% <100.00%> (ø)
cognite/client/utils/_url.py	100.00% <ø> (ø)
tests/tests_unit/test_api/test_streams.py	100.00% <100.00%> (ø)
... and 2 more

... and 5 files with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[haakonvt]

Part 1 of review: cognite/client/_api/streams/__init__.py