fix(log): filenotfound exception when cfn submit cluttering logs

[mmaeng]

Closes #212

switch try/except to if path exists before build path removal

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[kddejong]

I'm confused how this fixes the FileNotFoundError in the logs. Aren't we catching that exception and not printing it?

[mmaeng]

We are catching it but it is still showing up in the logs. So switched to a existence check first.

[2022-10-21T01:48:21Z] DEBUG    - Package started
[2022-10-21T01:48:21Z] DEBUG    - '/home/mmaeng/source/test-mod/build' not found, skipping removal
Traceback (most recent call last):
  File "/home/mmaeng/source/cloudformation-cli/.venv/lib/python3.8/site-packages/rpdk/typescript/codegen.py", line 226, in _remove_build_artifacts
    shutil.rmtree(deps_path)
  File "/usr/lib/python3.8/shutil.py", line 709, in rmtree
    onerror(os.lstat, path, sys.exc_info())
  File "/usr/lib/python3.8/shutil.py", line 707, in rmtree
    orig_st = os.lstat(path)
FileNotFoundError: [Errno 2] No such file or directory: '/home/mmaeng/source/test-mod/build'

[kddejong]

In other parts of the code we use shutil.rmtree(docs_path, ignore_errors=True) would that also fix it?

[mmaeng]

Switched to rmtree with ignore. That also looks to fix the error.