Fix raw-frame-arguments in combination with frame-filters

Currently, if frame-filters are active, raw-values is used instead of
raw-frame-arguments to decide if a pretty-printer should be invoked for
frame arguments in a backtrace.

In this example, "super struct" is the output of the pretty-printer:

    (gdb) disable frame-filter global BasicFrameFilter
    (gdb) bt
    #0  foo (x=42, ss=super struct = {...}) at C:/src/repos/gdb-testsuite/gdb/testsuite/gdb.python/py-frame-args.c:47
    #1  0x004016aa in main () at C:/src/repos/gdb-testsuite/gdb/testsuite/gdb.python/py-frame-args.c:57

If no frame-filter is active, then the raw-values print option does not
affect the backtrace output:

    (gdb) set print raw-values on
    (gdb) bt
    #0  foo (x=42, ss=super struct = {...}) at C:/src/repos/gdb-testsuite/gdb/testsuite/gdb.python/py-frame-args.c:47
    #1  0x004016aa in main () at C:/src/repos/gdb-testsuite/gdb/testsuite/gdb.python/py-frame-args.c:57
    (gdb) set print raw-values off

Instead, the raw-frame-arguments option disables the pretty-printer in the
backtrace:

    (gdb) bt -raw-frame-arguments on
    #0  foo (x=42, ss=...) at C:/src/repos/gdb-testsuite/gdb/testsuite/gdb.python/py-frame-args.c:47
    #1  0x004016aa in main () at C:/src/repos/gdb-testsuite/gdb/testsuite/gdb.python/py-frame-args.c:57

But if a frame-filter is active, the same rules don't apply.
The option raw-frame-arguments is ignored, but raw-values decides if the
pretty-printer is used:

    (gdb) enable frame-filter global BasicFrameFilter
    (gdb) bt
    #0  foo (x=42, ss=super struct = {...}) at C:/src/repos/gdb-testsuite/gdb/testsuite/gdb.python/py-frame-args.c:47
    #1  0x004016aa in main () at C:/src/repos/gdb-testsuite/gdb/testsuite/gdb.python/py-frame-args.c:57
    (gdb) set print raw-values on
    (gdb) bt
    #0  foo (x=42, ss=...) at C:/src/repos/gdb-testsuite/gdb/testsuite/gdb.python/py-frame-args.c:47
    #1  0x004016aa in main () at C:/src/repos/gdb-testsuite/gdb/testsuite/gdb.python/py-frame-args.c:57
    (gdb) set print raw-values off
    (gdb) bt -raw-frame-arguments on
    #0  foo (x=42, ss=super struct = {...}) at C:/src/repos/gdb-testsuite/gdb/testsuite/gdb.python/py-frame-args.c:47
    #1  0x004016aa in main () at C:/src/repos/gdb-testsuite/gdb/testsuite/gdb.python/py-frame-args.c:57

So this adds the PRINT_RAW_FRAME_ARGUMENTS flag to frame_filter_flag, which
is then used in the frame-filter to override the raw flag in enumerate_args.

Then the output is the same if a frame-filter is active, the pretty-printer
for backtraces is only disabled with the raw-frame-arguments option:

    (gdb) enable frame-filter global BasicFrameFilter
    (gdb) bt
    #0  foo (x=42, ss=super struct = {...}) at C:/src/repos/gdb-testsuite/gdb/testsuite/gdb.python/py-frame-args.c:47
    #1  0x004016aa in main () at C:/src/repos/gdb-testsuite/gdb/testsuite/gdb.python/py-frame-args.c:57
    (gdb) set print raw-values on
    (gdb) bt
    #0  foo (x=42, ss=super struct = {...}) at C:/src/repos/gdb-testsuite/gdb/testsuite/gdb.python/py-frame-args.c:47
    #1  0x004016aa in main () at C:/src/repos/gdb-testsuite/gdb/testsuite/gdb.python/py-frame-args.c:57
    (gdb) set print raw-values off
    (gdb) bt -raw-frame-arguments on
    #0  foo (x=42, ss=...) at C:/src/repos/gdb-testsuite/gdb/testsuite/gdb.python/py-frame-args.c:47
    #1  0x004016aa in main () at C:/src/repos/gdb-testsuite/gdb/testsuite/gdb.python/py-frame-args.c:57

Co-Authored-By: Andrew Burgess <aburgess@redhat.com>
Approved-By: Tom Tromey <tom@tromey.com>

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