[chore]: fix increment-decrement issues from revive (#4782)

Signed-off-by: Matthieu MOREL <matthieu.morel35@gmail.com>

Author: mmorel-35

.golangci.yaml

@@ -102,8 +102,6 @@ linters:
           disabled: true # FIXME
         - name: identical-switch-branches
           disabled: true # FIXME
-        - name: increment-decrement
-          disabled: true # FIXME
         - name: import-alias-naming
           disabled: true # FIXME
         - name: import-shadowing

cmd/otel-allocator/internal/target/discovery_test.go

@@ -506,7 +506,7 @@ func TestProcessTargetGroups_StableLabelIterationOrder(t *testing.T) {
 		expected := string(rune('a' + i))
 		assert.Equal(t, expected, l.Name, "unexpected label key at index %d", i)
 		assert.Equal(t, expected, l.Value, "unexpected label value at index %d", i)
-		i += 1
+		i++
 	})
 }