[lldb] Fix and rename skipIfHostIncompatibleWithRemote

Fix and rename the broken and confusingly named decorator
skipIfHostIncompatibleWithRemote. The decorator is meant to skip test
which uses the

[lldb] Fix and rename skipIfHostIncompatibleWithRemote

Fix and rename the broken and confusingly named decorator
skipIfHostIncompatibleWithRemote. The decorator is meant to skip test
which uses the inferior test build system (i.e. to build test inferiors)
to build host binaries (e.g. lldb drivers).

The decorator was broken on macOS, where the host and target platform
report macosx, but the decorator overwrote it with Darwin, resulting in
tests incorrectly being skipped.

The decorator was also missing on a handful of tests that use the
buildDriver helper, which this commit fixes as well.

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[NFC][Py Reformat] Reformat python files in lldb

This is an ongoing series of commits that are reformatting our Python
code. Reformatting is done with `black` (23.1.0).

If you end up having problem

[NFC][Py Reformat] Reformat python files in lldb

This is an ongoing series of commits that are reformatting our Python
code. Reformatting is done with `black` (23.1.0).

If you end up having problems merging this commit because you have made
changes to a python file, the best way to handle that is to run `git
checkout --ours <yourfile>` and then reformat it with black.

RFC: https://discourse.llvm.org/t/rfc-document-and-standardize-python-code-style

Differential revision: https://reviews.llvm.org/D151460

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[test] Allow skipTestIfFn to apply to entire classes for skipIfNoSBHeaders

Some test cases are already marked @skipIfNoSBHeaders, but they make use of SBAPI headers in test setup. The setup will fai

[test] Allow skipTestIfFn to apply to entire classes for skipIfNoSBHeaders

Some test cases are already marked @skipIfNoSBHeaders, but they make use of SBAPI headers in test setup. The setup will fail if the headers are missing, so it is too late to wait until the test case to apply the skip annotation.

In addition to allowing this to apply to entire classes, I also changed all the existing annotations from test cases to test classes where necessary/appropriate.

Reviewed By: DavidSpickett

Differential Revision: https://reviews.llvm.org/D138181

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[LLDB] Remove __future__ imports from tests

Not needed now that we require python 3.

Reviewed By: kastiglione, JDevlieghere

Differential Revision: https://reviews.llvm.org/D131761

[lldb][tests] Automatically call compute_mydir (NFC)

Eliminate boilerplate of having each test manually assign to `mydir` by calling
`compute_mydir` in lldbtest.py.

Differential Revision: https://r

[lldb][tests] Automatically call compute_mydir (NFC)

Eliminate boilerplate of having each test manually assign to `mydir` by calling
`compute_mydir` in lldbtest.py.

Differential Revision: https://reviews.llvm.org/D128077

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[lldb][testsuite] Create a SBDebugger instance for each test

Some tests set settings and don't clean them up, this leads to side effects in other tests.
The patch removes a global debugger instance

[lldb][testsuite] Create a SBDebugger instance for each test

Some tests set settings and don't clean them up, this leads to side effects in other tests.
The patch removes a global debugger instance with a per-test debugger to avoid such effects.

From what I see, lldb.DBG was needed to determine the platform before a test is run,
lldb.selected_platform is used for this purpose now. Though, this required adding a new function
to the SBPlatform interface.

Differential Revision: https://reviews.llvm.org/D74903

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[lldb][test] Remove symlink for API tests.

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

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

```
rm lldb/test/API/testcases
mkdi

[lldb][test] Remove symlink for API tests.

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

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