misc: Adjust timeout for compiler tests

This updates the timeout for the compiler tests to run per step
as opposed to by job, as well as increases this limit from
4 hours to 6 hours.

Change-Id: I6b0fe5561f74e450cd79205a96084dd27ccccead
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/71458
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

.github/workflows/compiler-tests.yaml

@@ -18,7 +18,6 @@ jobs:
         opts: [.opt, .fast]
     runs-on: [self-hosted, linux, x64, run]
     container: gcr.io/gem5-test/${{ matrix.image }}:latest
-    timeout-minutes: 240 # 4 hours
     steps:
     - uses: actions/checkout@v3
       with:
@@ -27,6 +26,7 @@ jobs:
         ref: develop
     - name: Compile build/ALL/gem5${{ matrix.opts }} with ${{ matrix.image }}
       run: /usr/bin/env python3 /usr/bin/scons --ignore-style build/ALL/gem5${{ matrix.opts }}
+      timeout-minutes: 300 # 6 hours
 
   # Tests the two latest gcc and clang supported compilers against all gem5 compilations.
   latest-compilers-all-gem5-builds:
@@ -37,7 +37,6 @@ jobs:
         opts: [.opt, .fast]
     runs-on: [self-hosted, linux, x64, run]
     container: gcr.io/gem5-test/${{ matrix.image }}:latest
-    timeout-minutes: 240 # 4 hours
     steps:
     - uses: actions/checkout@v3
       with:
@@ -46,3 +45,4 @@ jobs:
         ref: develop
     - name: Compile build/${{ matrix.gem5-compilation }}/gem5${{ matrix.opts }} with ${{ matrix.image }}
       run: /usr/bin/env python3 /usr/bin/scons --ignore-style build/${{ matrix.gem5-compilation }}/gem5${{ matrix.opts }}
+      timeout-minutes: 300 # 6 hours