GHA: reduce number of subsets

after introduction to ccache, setup is now significant part of run
by increasing jobs on machine we increase value

Signed-off-by: Robert Gałat <[email protected]>

Author: RobertGalatNordic

.github/workflows/run_tests.yml

@@ -86,12 +86,12 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        subset: [1, 2, 3, 4]
+        subset: [1, 2]
         board: ${{ fromJson(inputs.boards_to_test) }}
     uses: ./.github/workflows/run_tests_dut.yml
     with:
       subset: ${{ matrix.subset }}
-      max_subsets: 4
+      max_subsets: 2
       run_tests: true
       target_board: ${{ matrix.board }}
       nrf_revision: ${{ inputs.nrf_revision }}

.github/workflows/samples_build.yml

@@ -21,10 +21,10 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        subset: [1, 2, 3, 4, 5]
+        subset: [1, 2, 3]
         board: ${{ fromJson(inputs.boards_to_test) }}
     env:
-      MAX_SUBSETS: 5
+      MAX_SUBSETS: 3
 
     runs-on: ubuntu-24.04
     container: