perf parse-events: Remove non-json software events

perf parse-events: Remove non-json software events

Remove the hard coded encodings from parse-events. This has the
consequence that software events are matched using the sysfs/json
priority, will be case insensitive and will be wildcarded across PMUs.
As there were software and hardware types in the parsing code, the
removal means software vs hardware logic can be removed and hardware
assumed.

Now the perf json provides detailed descriptions of software events,
remove the previous listing support that didn't contain event
descriptions. When globbing is required for the "sw" option in perf
list, use string PMU globbing as was done previously for the tool PMU.

The output of `perf list sw` command changed like this.

Before:
  List of pre-defined events (to be used in -e or -M):

    alignment-faults                                   [Software event]
    bpf-output                                         [Software event]
    cgroup-switches                                    [Software event]
    context-switches OR cs                             [Software event]
    cpu-clock                                          [Software event]
    cpu-migrations OR migrations                       [Software event]
    dummy                                              [Software event]
    emulation-faults                                   [Software event]
    major-faults                                       [Software event]
    minor-faults                                       [Software event]
    page-faults OR faults                              [Software event]
    task-clock                                         [Software event]

After:
  List of pre-defined events (to be used in -e or -M):

  software:
    alignment-faults
         [Number of kernel handled memory alignment faults. Unit: software]
    bpf-output
         [An event used by BPF programs to write to the perf ring buffer. Unit: software]
    cgroup-switches
         [Number of context switches to a task in a different cgroup. Unit: software]
    context-switches
         [Number of context switches [This event is an alias of cs]. Unit: software]
    cpu-clock
         [Per-CPU high-resolution timer based event. Unit: software]
    cpu-migrations
         [Number of times a process has migrated to a new CPU [This event is an alias of migrations]. Unit: software]
    cs
         [Number of context switches [This event is an alias of context-switches]. Unit: software]
    dummy
         [A placeholder event that doesn't count anything. Unit: software]
    ...

Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Link: https://lore.kernel.org/r/20250725185202.68671-4-irogers@google.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>