ci: increase twister verbosity with single -v flag

[mniestroj]

This changes following report:

INFO    - Total complete:    1/   4   25%  built (not run):    1, filtered:    0, failed:    0, error:    0
INFO    - Total complete:    2/   4   50%  built (not run):    1, filtered:    0, failed:    0, error:    0
INFO    - Total complete:    3/   4   75%  built (not run):    1, filtered:    0, failed:    0, error:    0
INFO    - Total complete:    4/   4  100%  built (not run):    1, filtered:    0, failed:    0, error:    0
INFO    - 4 test scenarios (4 configurations) selected, 0 configurations filtered (0 by static filter, 0 at runtime).
INFO    - 3 of 4 executed test configurations passed (75.00%), 1 built (not run), 0 failed, 0 errored, with no warnings in 49.12 seconds.
INFO    - 3 of 3 executed test cases passed (100.00%) on 1 out of total 860 platforms (0.12%).
INFO    - 1 selected test cases not executed: 1 not run (built only).
INFO    - 3 test configurations executed on platforms, 1 test configurations were only built.

to:

INFO    - 1/4 native_sim/native/64      sample.golioth.location                            NOT RUN (build)
INFO    - 2/4 native_sim/native/64      sample.golioth.location.playback.wifi              PASSED (native 12.659s)
INFO    - 3/4 native_sim/native/64      sample.golioth.location.playback.cellular          PASSED (native 27.586s)
INFO    - 4/4 native_sim/native/64      sample.golioth.location.playback                   PASSED (native 37.606s)

INFO    - 4 test scenarios (4 configurations) selected, 0 configurations filtered (0 by static filter, 0 at runtime).
INFO    - 3 of 4 executed test configurations passed (75.00%), 1 built (not run), 0 failed, 0 errored, with no warnings in 49.04 seconds.
INFO    - 3 of 3 executed test cases passed (100.00%) on 1 out of total 860 platforms (0.12%).
INFO    - 1 selected test cases not executed: 1 not run (built only).
INFO    - 3 test configurations executed on platforms, 1 test configurations were only built.

[github-actions]

Visit the preview URL for this PR (updated for commit 801ba85):

https://golioth-firmware-sdk-doxygen-dev--pr752-twister-v-wgo29idg.web.app

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[github-actions]

Code Coverage

Package	Line Rate	Branch Rate	Health
include.golioth	75%	50%	✔
port.linux	62%	34%	➖
port.utils	58%	46%	➖
port.zephyr	53%	22%	➖
src	70%	32%	➖
Summary	69% (2850 / 4159)	31% (1183 / 3767)	➖

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

see 8 files with indirect coverage changes

[mniestroj]

Just removed second -v flag from one of the invocations, so that we have always the same verbosity.