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tools: add cli flag to run profile dump parsers

It is really inconvenient to use a standalone shell script to parse
binary dumps from profilers. That is why this commit introduces a
CLI flag for tools in the LuaJIT, so now it is possible to parse
a memprof dump as simple as:
```
luajit -tm memprof.bin
luajit -tm --leak-only memprof.bin
```

And the sysprof too:
```
luajit -ts sysprof.bin
luajit -ts --split sysprof.bin
```

The `luajit-parse-memprof` and `luajit-parse-sysprof` are purged
as a result of these changes.

Closes tarantool/tarantool#5688

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