tests: Update riscvmatched tests to use ALL/gem5.opt

Where possible we are trying to use the ALL/gem5.opt compilation of
gem5. This change updates the riscvmatched tests to this.

Change-Id: I1c5f1d86cdf5cf29b8964f8a894a3476a7cb290a
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/65854
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>

tests/gem5/gem5_library_example_tests/test_gem5_library_examples.py

@@ -303,7 +303,7 @@ gem5_verify_config(
         "riscvmatched-hello.py",
     ),
     config_args=[],
-    valid_isas=(constants.riscv_tag,),
+    valid_isas=(constants.all_compiled_tag,),
     valid_hosts=constants.supported_hosts,
     length=constants.long_tag,
 )
@@ -320,7 +320,7 @@ gem5_verify_config(
         "riscvmatched-fs.py",
     ),
     config_args=["--to-init"],
-    valid_isas=(constants.riscv_tag,),
+    valid_isas=(constants.all_compiled_tag,),
     valid_hosts=constants.supported_hosts,
     length=constants.very_long_tag,
 )