DLP: pick up fixes in GAPIC generator.

[yoshi-automation]

This PR was generated using Autosynth. 🌈

Here's the log from Synthtool:

synthtool > Cloning googleapis.
synthtool > Running generator for google/privacy/dlp/artman_dlp_v2.yaml.
synthtool > Ensuring dependencies.
synthtool > Pulling artman image.
latest: Pulling from googleapis/artman
Digest: sha256:90f9d15e9bad675aeecd586725bce48f5667ffe7d5fc4d1e96d51ff34304815b
Status: Image is up to date for googleapis/artman:latest
synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/dlp-v2.
synthtool > Replaced 'google\\.cloud\\.privacy\\.dlp_v2' in google/cloud/dlp_v2/proto/storage_pb2.py.
synthtool > Replaced 'google\\.cloud\\.privacy\\.dlp_v2' in google/cloud/dlp_v2/proto/dlp_pb2_grpc.py.
synthtool > Replaced 'google\\.cloud\\.privacy\\.dlp_v2' in google/cloud/dlp_v2/proto/dlp_pb2.py.
synthtool > Replaced '# Generated by the protocol buffer compiler.  DO NOT EDIT!' in google/cloud/dlp_v2/proto/dlp_pb2.py.
synthtool > No replacements made in google/cloud/dlp_v2/gapic/dlp_service_client.py for pattern (                \* .*
                )([^\s*]), maybe replacement is not longer needed?
synthtool > No replacements made in google/cloud/dlp_v2/gapic/dlp_service_client.py for pattern (\s+)\*.*
\s+::

, maybe replacement is not longer needed?
synthtool > Replaced 'number regex.*\n(\\s+)latex:.*\n' in google/cloud/dlp_v2/proto/storage_pb2.py.
synthtool > Replaced '(hotword_regex:)\n(\\s+Regular expression.*)\n' in google/cloud/dlp_v2/proto/storage_pb2.py.
synthtool > Replaced '(likelihood_adjustment:)\n' in google/cloud/dlp_v2/proto/storage_pb2.py.
synthtool > Replaced '(max_findings_per_item:)\n(\\s+Max number.*)\n(\\s+scanned. When.*)\n(\\s+maximum returned is 1000.*)\n(\\s+When set within.*)\n' in google/cloud/dlp_v2/proto/dlp_pb2.py.
synthtool > Replaced '(max_findings_per_request:)\n(\\s+Max number of.*)\n(\\s+When set .*)\n' in google/cloud/dlp_v2/proto/dlp_pb2.py.
synthtool > Replaced '(max_findings_per_info_type:)\n' in google/cloud/dlp_v2/proto/dlp_pb2.py.
synthtool > Replaced '(snapshot_inspect_template:)\n(\\s+If run with an .*)\n' in google/cloud/dlp_v2/proto/dlp_pb2.py.
synthtool > Replaced '(processed_bytes:)\n' in google/cloud/dlp_v2/proto/dlp_pb2.py.
synthtool > Replaced '(total_estimated_bytes:)\n' in google/cloud/dlp_v2/proto/dlp_pb2.py.
synthtool > Replaced '(info_type_stats:)\n' in google/cloud/dlp_v2/proto/dlp_pb2.py.
synthtool > Replaced '(Statistics of how many instances of each info type were found)\n' in google/cloud/dlp_v2/proto/dlp_pb2.py.
synthtool > Replaced '(requested_options:)\n' in google/cloud/dlp_v2/proto/dlp_pb2.py.
synthtool > Replaced '(sensitive_value_frequency_lower_bound:)\n(\\s+Lower bound.*)\n' in google/cloud/dlp_v2/proto/dlp_pb2.py.
synthtool > Replaced '(sensitive_value_frequency_upper_bound:)\n(\\s+Upper bound.*)\n' in google/cloud/dlp_v2/proto/dlp_pb2.py.
synthtool > Replaced '(bucket_size:)\n(\\s+Total number of equivalence.*)\n' in google/cloud/dlp_v2/proto/dlp_pb2.py.
synthtool > Replaced '(bucket_values:)\n(\\s+Sample of equivalence.*)\n' in google/cloud/dlp_v2/proto/dlp_pb2.py.
synthtool > Replaced '(offset_minutes:)\n(\\s+Set only.*)\n' in google/cloud/dlp_v2/proto/dlp_pb2.py.
synthtool > Replaced '(result:)\n(\\s+A summary of the outcome of this inspect job.)' in google/cloud/dlp_v2/proto/dlp_pb2.py.
synthtool > Replaced '(storage_config:)\n(\\s+The data to scan.\n)' in google/cloud/dlp_v2/proto/dlp_pb2.py.
synthtool > Replaced '(inspect_config:)\n(\\s+How and what to scan for.\n)' in google/cloud/dlp_v2/proto/dlp_pb2.py.
synthtool > Replaced '(inspect_template_name:)\n(\\s+If provided, will be.*)\n(\\s+InspectConfig.*)\n(\\s+values persisted.*)\n(\\s+actions:)\n(\\s+Actions to.*)\n' in google/cloud/dlp_v2/proto/dlp_pb2.py.
synthtool > Replaced '    (\\s+Set of values defining the equivalence class.*)\n    (\\s+quasi-identifier.*)\n    (\\s+message. The order.*)\n' in google/cloud/dlp_v2/proto/dlp_pb2.py.
synthtool > Replaced '    (\\s+Size of the equivalence class, for example number of rows with)\n    (\\s+the above set of values.)\n' in google/cloud/dlp_v2/proto/dlp_pb2.py.
synthtool > Replaced '(equivalence_class_size_lower_bound:)\n(\\s+Lower bound.*)\n' in google/cloud/dlp_v2/proto/dlp_pb2.py.
synthtool > Replaced '(equivalence_class_size_upper_bound:)\n(\\s+Upper bound.*)\n' in google/cloud/dlp_v2/proto/dlp_pb2.py.
synthtool > Replaced '(bucket_value_count:)\n(\\s+Total number of distinct equivalence.*)\n' in google/cloud/dlp_v2/proto/dlp_pb2.py.
synthtool > Replaced '(value_frequency_lower_bound:)\n\\s+(Lower bound.*)\n\\s+(bucket.\n)(\\s+value_frequency_upper.*)\n\\s+(Upper.*)\n\\s+(bucket.\n)(\\s+bucket_size:)\n\\s+(Total.*\n)(\\s+bucket_values:)\n\\s+(Sample of value.*)\n\\s+(of values.*\n)(\\s+bucket_value_count:)\n\\s+(Total number.*\n)' in google/cloud/dlp_v2/proto/dlp_pb2.py.
synthtool > Replaced '(DESCRIPTOR .*_TAGGEDFIELD,\n\\s+__module__.*\n\\s+,\n\\s+__doc__.*\n)(\\s+field:)\n(\\s+Identifies .*)\n(\\s+tag:)\n(\\s+Semantic.*)\n(\\s+determine.*)\n(\\s+reidentifiability.*)\n(\\s+info_type:)\n(\\s+A column.*)\n(\\s+public dataset.*)\n(\\s+available.*)\n(\\s+ages.*)\n(\\s+supported Info.*)\n(\\s+supported.*)\n(\\s+custom_tag:)\n(\\s+A col.*)\n(\\s+user must.*)\n(\\s+statist.*)\n(\\s+\\(below.*)\n(\\s+inferred:)\n(\\s+If no semantic.*)\n' in google/cloud/dlp_v2/proto/dlp_pb2.py.
synthtool > Replaced '(////////.*)\n\\s+(///////////////\n)' in google/cloud/dlp_v2/proto/dlp_pb2.py.
synthtool > Replaced '^\\s+resource was created.' in google/cloud/dlp_v2/gapic/dlp_service_client.py.
synthtool > Replaced '(\\s+)WHITESPACE \\(int\\).*\n' in google/cloud/dlp_v2/gapic/enums.py.
synthtool > Replaced '.*:raw-latex:.*\n' in google/cloud/dlp_v2/gapic/enums.py.
synthtool > Cleaned up 1 temporary directories.

[tseaver]

Includes fixes from these PRs:

• Remove pending deprecation spew from unit tests. gapic-generator#2407
• Python: expose 'channel' as a property of the transport. gapic-generator#2396