tests: mark testcases with pm where CONFIG_PM=y is forced

This commit marks testcases that require working Power Managament with
the appropriate `pm` tag to allow proper testcase filtering in the board
YAML file.

Signed-off-by: Filip Kokosinski <fkokosinski@antmicro.com>

tests/benchmarks/footprints/testcase.yaml

@@ -3,7 +3,7 @@ tests:
     tags: benchmark
     build_only: true
   benchmark.kernel.footprints.pm:
-    tags: benchmark
+    tags: benchmark pm
     build_only: true
     extra_args: CONF_FILE=prj_pm.conf
   benchmark.kernel.footprints.userspace:

tests/kernel/profiling/profiling_api/testcase.yaml

@@ -4,4 +4,4 @@ tests:
     platform_exclude: em_starterkit
       litex_vexriscv rv32m1_vega_zero_riscy rv32m1_vega_ri5cy
       nrf5340dk_nrf5340_cpunet
-    tags: kernel
+    tags: kernel pm

tests/kernel/tickless/tickless_concept/testcase.yaml

@@ -5,4 +5,4 @@ tests:
     # consistently when coverage is enabled. Disable until 14173 is fixed.
     platform_exclude: litex_vexriscv rv32m1_vega_zero_riscy rv32m1_vega_ri5cy
       nrf5340dk_nrf5340_cpunet nucleo_l073rz
-    tags: kernel
+    tags: kernel pm

tests/kernel/timer/timer_api/testcase.yaml

@@ -6,7 +6,7 @@ tests:
     arch_exclude: nios2 posix
     platform_exclude: litex_vexriscv rv32m1_vega_zero_riscy rv32m1_vega_ri5cy
       nrf5340dk_nrf5340_cpunet
-    tags: kernel timer userspace
+    tags: kernel timer userspace pm
   kernel.timer.no_multitheading:
     tags: kernel timer
     platform_allow: qemu_cortex_m3 nsim_em nsim_em7d_v22 nsim_hs nsim_hs_mpuv6