testsuite: remove undesired -fasm flag from test ways

This patch removes the -fasm flag from test ways, except ways like
optasm that explicitly state they are meant to be compiled with NCG
backend. Most test ways should use the default codegen backend, and
the precense of -fasm can cause stderr mismatches like this when GHC
is configured with the unregisterised backend:

```
--- /dev/null
+++ /tmp/ghctest-3hydwldj/test   spaces/testsuite/tests/profiling/should_compile/prof-late-cc.run/prof-late-cc.comp.stderr.normalised
@@ -0,0 +1,2 @@
+when making flags consistent: warning: [GHC-74335] [-Winconsistent-flags (in -Wdefault)]
+    Target platform uses unregisterised ABI, so compiling via C
*** unexpected failure for prof-late-cc(prof_no_auto)
```

This has been breaking the wasm unreg nightly job since !12595 landed.

testsuite/config/ghc

@@ -93,10 +93,10 @@ config.way_flags = {
     'llvm'         : ['-fllvm'],
     'optllvm'      : ['-O', '-fllvm'],
     'debugllvm'    : ['-fllvm', '-keep-llvm-files'],
-    'prof'         : ['-prof', '-static', '-fprof-auto', '-fasm'],
+    'prof'         : ['-prof', '-static', '-fprof-auto'],
     'profdyn'      : ['-prof', '-dynamic', '-fprof-auto'],
     'profdyn_no_auto' : ['-prof', '-dynamic' ],
-    'prof_no_auto' : ['-prof', '-static', '-fasm'],
+    'prof_no_auto' : ['-prof', '-static'],
     'profasm'      : ['-O', '-prof', '-static', '-fprof-auto'],
     'profthreaded' : ['-O', '-prof', '-static', '-fprof-auto', '-threaded'],
     'ghci'         : ['--interactive', '-fno-unoptimized-core-for-interpreter', '-O0', '-v0', '-ignore-dot-ghci', '-fno-ghci-history', '+RTS', '-I0.1', '-RTS'] + (['-fghci-leak-check'] if not config.compiler_debugged else []),