chore(stream): rename StreamEnvironment to StreamContext

[KeXiangWang]

I hereby agree to the terms of the RisingWave Labs, Inc. Contributor License Agreement.

What's changed and what's your intention?

As mentioned in #13702 (comment), in stream_manager, we have two different data structure both called StreamEnvironment, which is confusing. This PR rename one to StreamContext to avoid the ambiguity.

Simply renaming one message should not cause compatiblity issues. As protobuf use type and serial number to recognize one message.

Checklist

• I have written necessary rustdoc comments
• I have added necessary unit tests and integration tests
• I have added test labels as necessary. See details.
• I have added fuzzing tests or opened an issue to track them. (Optional, recommended for new SQL features Sqlsmith: Sql feature generation #7934).
• My PR contains breaking changes. (If it deprecates some features, please create a tracking issue to remove them in the future).
• All checks passed in ./risedev check (or alias, ./risedev c)
• My PR changes performance-critical code. (Please run macro/micro-benchmarks and show the results.)

• My PR contains critical fixes that are necessary to be merged into the latest release. (Please check out the details)

Documentation

• My PR needs documentation updates. (Please use the Release note section below to summarize the impact on users)

Release note

If this PR includes changes that directly affect users or other significant modifications relevant to the community, kindly draft a release note to provide a concise summary of these changes. Please prioritize highlighting the impact these changes will have on users.

[fuyufjh]

Simply renaming one message should not cause compatiblity issues. As protobuf use type and serial number to recognize one message.

That's true. But let me run a compatibility test just in case.

[codecov]

Codecov Report

Attention: 920 lines in your changes are missing coverage. Please review.

Comparison is base (b87bcc3) 68.33% compared to head (23d1b41) 68.12%.
Report is 5 commits behind head on main.

Files	Patch %	Lines
src/meta/src/rpc/ddl_controller.rs	0.00%	232 Missing ⚠️
src/frontend/src/handler/create_sink.rs	14.96%	216 Missing ⚠️
src/meta/src/barrier/command.rs	8.82%	93 Missing ⚠️
src/meta/service/src/ddl_service.rs	0.00%	63 Missing ⚠️
src/meta/src/manager/catalog/mod.rs	18.64%	48 Missing ⚠️
src/stream/src/executor/mod.rs	22.72%	34 Missing ⚠️
src/meta/src/stream/stream_manager.rs	34.78%	30 Missing ⚠️
src/connector/src/sink/table.rs	0.00%	23 Missing ⚠️
src/meta/src/model/stream.rs	21.42%	22 Missing ⚠️
src/frontend/src/catalog/catalog_service.rs	0.00%	20 Missing ⚠️
... and 19 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #13863      +/-   ##
==========================================
- Coverage   68.33%   68.12%   -0.22%     
==========================================
  Files        1528     1529       +1     
  Lines      263343   264142     +799     
==========================================
- Hits       179958   179944      -14     
- Misses      83385    84198     +813     

Flag	Coverage Δ
rust	68.12% <26.40%> (-0.22%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.