tests: fix pre-commit warnings in bash/python

[dougsland]

[root@dell730 qm]# pre-commit run --all-files
trim trailing whitespace.................................................Passed
shellcheck...............................................................Passed
markdownlint.............................................................Passed
flake8...................................................................Passed

[dougsland]

/cc @sandrobonazzola

[dougsland]

/hold

Need to do the manual tests in the tool.

[dougsland]

flake8 output

qm# flake8 tests/e2e/dashboard-tui/car-dashboard
qm#

pre-commit output

qm# pre-commit run --all-files
trim trailing whitespace.................................................Passed
shellcheck...............................................................Passed
markdownlint.............................................................Passed
flake8...................................................................Passed

running e2e tool

qm#> cd tests/e2e
qm#> ./run-test-e2e
# ./run-test-e2e
[ INFO  ] Starting setup
[ INFO  ] ==============================
[ INFO  ] Creating dual stack network
[ INFO  ] Cleaning any previous e2e files

[ INFO  ] Preparing ASIL environment
[ INFO  ] ==============================
[ INFO  ] Creating container control [ASIL mode]. It might take some time...
[ INFO  ] Creating stub systemd service: container-safety in container control. It might take some time...
[ INFO  ] Creating stub systemd service: container-cruise_control in container control. It might take some time...
[ INFO  ] Creating stub systemd service: container-tires in container control. It might take some time...
[ INFO  ] Creating stub systemd service: container-breaks in container control. It might take some time...

[ INFO  ] Preparing QM environment
[ INFO  ] ==============================
[ INFO  ] Creating container node1 [QM mode]
[ INFO  ] Creating stub systemd service: container-radio in node1 and moving it to container qm inside node1
[ INFO  ] Creating stub systemd service: container-store in node1 and moving it to container qm inside node1
[ INFO  ] Creating stub systemd service: container-stream_audio in node1 and moving it to container qm inside node1
[ INFO  ] Creating stub systemd service: container-maps in node1 and moving it to container qm inside node1

[ INFO  ] Starting tests
[ INFO  ] ==============================
[ INFO  ] Waiting hirte containers be ready...

[ INFO  ] #1- Test scenario: hirte list all units from control to node (vise-versa)
[ INFO  ] Connected to control, listing few systemd units from control
NODE                |ID                                                         |   ACTIVE|      SUB
====================================================================================================
control             |dev-disk-by\x2dpartuuid-39fbd751\x2d764c\x2d48ca\x2d8e66\x2|   active|  plugged
control             |run-lock.mount                                             |   active|  mounted
control             |sys-devices-platform-serial8250-tty-ttyS25.device          |   active|  plugged
[ INFO  ] Connected to control, listing few systemd units from node1
NODE                |ID                                                         |   ACTIVE|      SUB
====================================================================================================
node1               |systemd-oomd.service                                       | inactive|     dead
node1               |systemd-tmpfiles-clean.service                             | inactive|     dead
node1               |rescue.service                                             | inactive|     dead
[ INFO  ] Connected to control, listing few systemd units from qm-node1
NODE                |ID                                                         |   ACTIVE|      SUB
====================================================================================================
qm-node1            |systemd-vconsole-setup.service                             | inactive|     dead
qm-node1            |auditd.service                                             | inactive|     dead
qm-node1            |systemd-ask-password-console.service                       | inactive|     dead
[ INFO  ] All set!

dashboard

# e2e> cd dashboard-tui
# dashboard-tui> ./car-dashboard

SCENARIO 1: TYPED in the console: sigstop control safety (WORKED, stop the service in the control node)
SCENARIO 2: TYPED in the console: sigstart control safety (WORKED too)

[dougsland]

CI/CD green, just cosmetic change, safe to merge.