rtla/tests: Cover both top and hist tools where possible

RTLA runtime tests currently do not cover both tool variants for osnoise
and timerlat properly. Many tests applicable to both tools are only
tested for one tool, selected randomly.

Introduce two new shell functions, check_top_hist() and
check_top_q_hist(). The functions use the same syntax as check() and run
check() on the arguments twice: once replacing the "TOOL" string in the
command with "top" (or "top -q"), once replacing it with "hist". The top
-q variant is used for tests relying on messages printed after aborting
the RTLA main loop with a starting new line, which only happens for top
tools in quiet mode; without -q, the top output is printed on the same
line and the matches would fail.

Tests that are applicable to both top and hist tools were modified to
the run for both; additionally, tests that were already done for both
tools were migrated to the new shell functions, unless the test command
or matches differ between the tools. Additional tests were added to test
tool-specific help messages.

Reviewed-by: Wander Lairson Costa <wander@redhat.com>
Link: https://lore.kernel.org/r/20260423130558.882022-2-tglozar@redhat.com
Signed-off-by: Tomas Glozar <tglozar@redhat.com>

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