[PATCH v3 0/3] tests/Makefile: improvements on make check-acceptance

[Willian Rampazzo]

Improve the documentation about how to run a single test within a file
or all the tests from a file using the standalone avocado command.

Add a way to run tests based on tags using the `make check-acceptance`
command.

Add a way to run specific tests using the `make check-acceptance` command.

GitLab pipeline: https://gitlab.com/willianrampazzo/qemu/-/pipelines/376122402

Changes from V2:
  - Rename the environment variable to AVOCADO_TESTS
  - Adjust the documentation to mention `make check-venv`
  - Adjust the documentation to mention `avocado list` command
  - Add the AVOCADO_TAGS implementation patch to the series.

Changes from V1:
  - Rename TESTFILES to AVOCADO_TEST_FILES on patch 2
  - Add Suggested-by tag on patch 2

Willian Rampazzo (3):
  tests/Makefile: allow control over tags during check-acceptance
  docs/devel/testing: add instruction to run a single acceptance test
  tests/Makefile: add AVOCADO_TESTS option to make check-acceptance

 docs/devel/testing.rst | 69 ++++++++++++++++++++++++++++++++++++++++++
 tests/Makefile.include | 17 ++++++++---
 2 files changed, 82 insertions(+), 4 deletions(-)

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2.31.1