Add mesa-ci-status

mesa-ci-status retrieves information through GITLAB API and generates a report in the format below. This report can be sent by email or posted in a gitlab issue with the --gitlab_post option.

Example of generated report:

PERIOD: 2022-04-01 - 2022-04-03

FAILED MERGE PIPELINES: 3/21 - 14.29%

FAILED JOBS: 10/1341 - 0.75%

TOP 5 FAILING JOBS:
+----------------------------+----------------------+
| job name                   |   number of failures |
+============================+======================+
| a630-traces-restricted     |                    2 |
+----------------------------+----------------------+
| panfrost-t760-traces:armhf |                    2 |
+----------------------------+----------------------+
| panfrost-t760-gles2:armhf  |                    2 |
+----------------------------+----------------------+
| panfrost-t720-gles2:arm64  |                    2 |
+----------------------------+----------------------+
| softpipe                   |                    1 |
+----------------------------+----------------------+

FAILED JOBS (limited to 100 entries):
+----------------------------+---------------+-------------------+----------------------------------------------------------+
| job name                   |   pipeline id | stage             | web_url                                                  |
+============================+===============+===================+==========================================================+
| a630-traces-restricted     |        548584 | freedreno         | https://gitlab.freedesktop.org/mesa/mesa/-/jobs/20643544 |
+----------------------------+---------------+-------------------+----------------------------------------------------------+
| panfrost-t760-traces:armhf |        547770 | arm               | https://gitlab.freedesktop.org/mesa/mesa/-/jobs/20610138 |
+----------------------------+---------------+-------------------+----------------------------------------------------------+
| panfrost-t760-gles2:armhf  |        547770 | arm               | https://gitlab.freedesktop.org/mesa/mesa/-/jobs/20610137 |
+----------------------------+---------------+-------------------+----------------------------------------------------------+
| panfrost-t720-gles2:arm64  |        547770 | arm               | https://gitlab.freedesktop.org/mesa/mesa/-/jobs/20610136 |
+----------------------------+---------------+-------------------+----------------------------------------------------------+
| softpipe                   |        547770 | software-renderer | https://gitlab.freedesktop.org/mesa/mesa/-/jobs/20608564 |
+----------------------------+---------------+-------------------+----------------------------------------------------------+
| panfrost-t760-traces:armhf |        547770 | arm               | https://gitlab.freedesktop.org/mesa/mesa/-/jobs/20608508 |
+----------------------------+---------------+-------------------+----------------------------------------------------------+
| panfrost-t760-gles2:armhf  |        547770 | arm               | https://gitlab.freedesktop.org/mesa/mesa/-/jobs/20608507 |
+----------------------------+---------------+-------------------+----------------------------------------------------------+
| panfrost-t720-gles2:arm64  |        547770 | arm               | https://gitlab.freedesktop.org/mesa/mesa/-/jobs/20608506 |
+----------------------------+---------------+-------------------+----------------------------------------------------------+
| a630-traces-restricted     |        547387 | freedreno         | https://gitlab.freedesktop.org/mesa/mesa/-/jobs/20590088 |
+----------------------------+---------------+-------------------+----------------------------------------------------------+
| panfrost-g72-gl:arm64 2/3  |        547387 | arm               | https://gitlab.freedesktop.org/mesa/mesa/-/jobs/20590040 |
+----------------------------+---------------+-------------------+----------------------------------------------------------+
...

INFORMATION:
    All numbers only considers mesa/mesa.
    Pipelines with updated_at < 2022-04-01 and jobs with finished_at < 2022-04-01 were ignored.
    FAILED MERGE PIPELINES: Calculated from finished pipelines triggered by Marge in a merge requests.
                            Counted when a pipeline contains a failed job, even if it got retried and
                            the pipeline passed (status success).
    FAILED JOBS: Consider jobs from the same pipelines from FAILED MERGE PIPELINES.