Migrate bandit options to pyproject.toml

... so that these options can be used by different tools than
tox/pre-commit more easily.

Change-Id: I84450593a75ccbc957b98595f672320bb897009c
Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>

.pre-commit-config.yaml

@@ -21,7 +21,7 @@ repos:
     rev: 1.8.6
     hooks:
       - id: bandit
-        args: ['-x', 'tests', '--skip', 'B404,B603']
+        args: ['-c', 'pyproject.toml']
   - repo: https://github.com/asottile/pyupgrade
     rev: v3.20.0
     hooks:

pyproject.toml

@@ -39,3 +39,7 @@ privsep-helper = "oslo_privsep.daemon:helper_main"
 
 [tool.setuptools]
 packages = ["oslo_privsep"]
+
+[tool.bandit]
+exclude_dirs = ["tests"]
+skips = ['B404', 'B603']