http: migrate local_ratelimit/mcp/... to exception free

[wbpcode]

Commit Message: http: migrate local_ratelimit/mcp/... to exception free
Additional Description:

Migrate previous exceptions to absl::Status or absl::StatusOr.

Risk Level: low.
Testing: unit/integration.
Docs Changes: n/a.
Release Notes: n/a.
Platform Specific Features: n/a.

[Copilot]

Pull request overview

Migrates several HTTP filter config factories and config construction paths from exception-based error handling to exception-free absl::Status/absl::StatusOr, aligning these extensions with Envoy’s exception-free factory infrastructure.

Changes:

• Converted OnDemand, local rate limit, MCP, MCP router, and original_src factories to Common::ExceptionFreeFactoryBase and updated factory methods to return absl::StatusOr<Http::FilterFactoryCb>.
• Reworked OnDemandFilterConfig and LocalRateLimitFilter::FilterConfig construction to report validation/configuration failures via absl::Status instead of throwing EnvoyException.
• Updated affected unit tests and BUILD deps to validate failures via status matchers (and added status_utility deps where needed).

Reviewed changes

Copilot reviewed 19 out of 19 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
test/extensions/filters/http/on_demand/on_demand_filter_test.cc	Updates config-construction test expectations to use absl::Status + HasStatus.
test/extensions/filters/http/on_demand/BUILD	Adds status_utility dependency for updated tests.
test/extensions/filters/http/local_ratelimit/filter_test.cc	Switches test config construction to capture and assert creation_status.
test/extensions/filters/http/local_ratelimit/config_test.cc	Replaces exception-based assertions with status-based assertions/matchers.
test/extensions/filters/http/local_ratelimit/BUILD	Adds status_utility dependency for updated tests.
source/extensions/filters/http/original_src/original_src_config_factory.h	Converts factory to exception-free base and status-returning factory method.
source/extensions/filters/http/original_src/original_src_config_factory.cc	Updates factory method return type to absl::StatusOr.
source/extensions/filters/http/on_demand/on_demand_update.h	Adds absl::Status& creation_status to config constructors.
source/extensions/filters/http/on_demand/on_demand_update.cc	Converts internal helper to StatusOr and plumbs status out of config constructors.
source/extensions/filters/http/on_demand/config.h	Converts factory to exception-free base and status-returning methods.
source/extensions/filters/http/on_demand/config.cc	Checks creation_status after config construction and returns non-OK status.
source/extensions/filters/http/mcp/config.h	Converts factory to exception-free base and status-returning methods.
source/extensions/filters/http/mcp/config.cc	Updates factory method return type to absl::StatusOr.
source/extensions/filters/http/mcp_router/config.h	Converts factory to exception-free base and status-returning factory method.
source/extensions/filters/http/mcp_router/config.cc	Updates factory method return type to absl::StatusOr.
source/extensions/filters/http/local_ratelimit/local_ratelimit.h	Adds absl::Status& creation_status to FilterConfig constructor.
source/extensions/filters/http/local_ratelimit/local_ratelimit.cc	Replaces throws with status-setting + early returns and plumbs creation failures.
source/extensions/filters/http/local_ratelimit/config.h	Converts factory to exception-free base and status-returning factory method.
source/extensions/filters/http/local_ratelimit/config.cc	Plumbs creation_status through filter config creation and returns errors via StatusOr.

[wbpcode]

/coverage

[repokitteh-read-only]

Coverage for this Pull Request will be rendered here:

https://storage.googleapis.com/envoy-cncf-pr/46038/coverage/index.html

For comparison, current coverage on main branch is here:

https://storage.googleapis.com/envoy-cncf-postsubmit/main/coverage/index.html

The coverage results are (re-)rendered each time the CI Envoy/Checks (coverage) job completes.

🐱

Caused by: a #46038 (comment) was created by @wbpcode.

see: more, trace.