ci: suppress pytest streaming output in CI (#36092)

Reduce CI log noise by suppressing pytest's per-test dot/verbose
streaming output. The `_test.yml` workflow now passes `PYTEST_EXTRA=-q`
to `make test`, which overrides the default verbosity with quiet mode —
failures still print in full, but the thousands of `.......` progress
lines are gone. Local `make test` is unaffected since `PYTEST_EXTRA`
defaults empty.

## Changes
- Add `PYTEST_EXTRA ?=` variable to all 21 package Makefiles and inject
it into each `test` target's pytest invocation
- Pass `PYTEST_EXTRA=-q` in `_test.yml` for both the main test step and
the min-version retest step

libs/text-splitters/Makefile

@@ -5,12 +5,13 @@ all: help
 
 # Define a variable for the test file path.
 TEST_FILE ?= tests/unit_tests/
+PYTEST_EXTRA ?=
 
 .EXPORT_ALL_VARIABLES:
 UV_FROZEN = true
 
 test tests:
-	uv run --group test pytest -n auto --disable-socket --allow-unix-socket $(TEST_FILE)
+	uv run --group test pytest -n auto $(PYTEST_EXTRA) --disable-socket --allow-unix-socket $(TEST_FILE)
 
 integration_test integration_tests:
 	uv run --group test --group test_integration pytest tests/integration_tests/