# Summary
`SBFileSpec::GetPath(char *dst_path, size_t dst_len)` contains `char*`
type argument. Need to handle this for python. Fortunately there're
already similar definitions we can reuse.

# Test Plan
Start the freshly built lldb and run the following code
```
$ lldb
(lldb) script
Python Interactive Interpreter. To exit, type 'quit()', 'exit()' or Ctrl-D.
>>> debugger = lldb.SBDebugger.Create()
>>> debugger.SetAsync (False)
>>> target = debugger.CreateTarget("~/tmp/hello")
>>> target.IsValid()
True
>>> breakpoint = target.BreakpointCreateByName('main', 'hello')
>>> breakpoint.GetNumLocations()
1
>>> process = target.LaunchSimple (None, None, os.getcwd())
>>> process.IsValid()
True
>>> thread = process.GetThreadAtIndex(0)
>>> frame = thread.GetFrameAtIndex(0)
>>> line = frame.GetLineEntry()

# Important line below
>>> file = line.GetFileSpec().GetPath(1024)
# Important line above

>>> print(file)
/home/wanyi/tmp/main.cpp
```

## Before this change
```
$ lldb
(lldb) script
Python Interactive Interpreter. To exit, type 'quit()', 'exit()' or Ctrl-D.
>>> debugger = lldb.SBDebugger.Create()
>>> debugger.SetAsync (False)
>>> target = debugger.CreateTarget("~/tmp/hello")
>>> target.IsValid()
True
>>> breakpoint = target.BreakpointCreateByName('main', 'hello')
>>> breakpoint.GetNumLocations()
1
>>> process = target.LaunchSimple (None, None, os.getcwd())
>>> process.IsValid()
True
>>> thread = process.GetThreadAtIndex(0)
>>> frame = thread.GetFrameAtIndex(0)
>>> line = frame.GetLineEntry()
>>> file = line.GetFileSpec().GetPath(1024)
Traceback (most recent call last):
  File "<console>", line 1, in <module>
TypeError: SBFileSpec.GetPath() missing 1 required positional argument: 'dst_len'
>>> print(file)
Traceback (most recent call last):
  File "<console>", line 1, in <module>
NameError: name 'file' is not defined
```

Summary: Moves lldbsuite tests to lldb/test/API.

This is a largely mechanical change, moved with the following steps:

```
rm lldb/test/API/testcases
mkdir -p lldb/test/API/{test_runner/test,tools/lldb-{server,vscode}}
mv lldb/packages/Python/lldbsuite/test/test_runner/test lldb/test/API/test_runner
for d in $(find lldb/packages/Python/lldbsuite/test/* -maxdepth 0 -type d | egrep -v "make|plugins|test_runner|tools"); do mv $d lldb/test/API; done
for d in $(find lldb/packages/Python/lldbsuite/test/tools/lldb-vscode -maxdepth 1 -mindepth 1 | grep -v ".py"); do mv $d lldb/test/API/tools/lldb-vscode; done
for d in $(find lldb/packages/Python/lldbsuite/test/tools/lldb-server -maxdepth 1 -mindepth 1 | egrep -v "gdbremote_testcase.py|lldbgdbserverutils.py|socket_packet_pump.py"); do mv $d lldb/test/API/tools/lldb-server; done
```

lldb/packages/Python/lldbsuite/__init__.py and lldb/test/API/lit.cfg.py were also updated with the new directory structure.

Reviewers: labath, JDevlieghere

Tags: #lldb

Differential Revision: https://reviews.llvm.org/D71151