fix: DEADLINE_EXCEEDED retry code is idempotent

[yoshi-automation]

This PR was generated using Autosynth. 🌈

Here's the log from Synthtool:

synthtool > Executing /tmpfs/src/git/autosynth/working_repo/synth.py.
synthtool > Ensuring dependencies.
synthtool > Pulling artman image.
latest: Pulling from googleapis/artman
Digest: sha256:d3df563538225ac6caac45d8ad86499500211d1bcb2536955a6dbda15e1b368e
Status: Image is up to date for googleapis/artman:latest
synthtool > Cloning googleapis.
synthtool > Running generator for google/logging/artman_logging.yaml.
synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/js/logging-v2.
synthtool > Replaced '../../package.json' in src/v2/config_service_v2_client.js.
synthtool > Replaced '../../package.json' in src/v2/logging_service_v2_client.js.
synthtool > Replaced '../../package.json' in src/v2/metrics_service_v2_client.js.
.eslintignore
.eslintrc.yml
.github/ISSUE_TEMPLATE/bug_report.md
.github/ISSUE_TEMPLATE/feature_request.md
.github/ISSUE_TEMPLATE/support_request.md
.jsdoc.js
.kokoro/common.cfg
.kokoro/continuous/node10/common.cfg
.kokoro/continuous/node10/docs.cfg
.kokoro/continuous/node10/lint.cfg
.kokoro/continuous/node10/samples-test.cfg
.kokoro/continuous/node10/system-test.cfg
.kokoro/continuous/node10/test.cfg
.kokoro/continuous/node11/common.cfg
.kokoro/continuous/node11/test.cfg
.kokoro/continuous/node8/common.cfg
.kokoro/continuous/node8/test.cfg
.kokoro/docs.sh
.kokoro/lint.sh
.kokoro/presubmit/node10/common.cfg
.kokoro/presubmit/node10/docs.cfg
.kokoro/presubmit/node10/lint.cfg
.kokoro/presubmit/node10/samples-test.cfg
.kokoro/presubmit/node10/system-test.cfg
.kokoro/presubmit/node10/test.cfg
.kokoro/presubmit/node11/common.cfg
.kokoro/presubmit/node11/test.cfg
.kokoro/presubmit/node8/common.cfg
.kokoro/presubmit/node8/test.cfg
.kokoro/presubmit/windows/common.cfg
.kokoro/presubmit/windows/test.cfg
.kokoro/publish.sh
.kokoro/release/publish.cfg
.kokoro/samples-test.sh
.kokoro/system-test.sh
.kokoro/test.bat
.kokoro/test.sh
.kokoro/trampoline.sh
.nycrc
.prettierignore
.prettierrc
CODE_OF_CONDUCT.md
CONTRIBUTING.md
LICENSE
Skipping: README.md
codecov.yaml
renovate.json
Skipping: samples/README.md
synthtool > Replaced 'https:\\/\\/cloud\\.google\\.com[\\s\\*]*http:\\/\\/(.*)[\\s\\*]*\\)' in src/v2/doc/google/protobuf/doc_timestamp.js.
synthtool > No replacements made in **/doc/google/protobuf/doc_timestamp.js for pattern toISOString\], maybe replacement is not longer needed?
synthtool > Replaced 'Sum\\[i=1\\.\\.n\\]\\(https:\\/\\/cloud\\.google\\.com\\(x_i - mean\\)\\^2\\)' in src/v2/doc/google/api/doc_distribution.js.
npm WARN deprecated ecstatic@4.1.2: https://github.com/jfhbrook/node-ecstatic/issues/259

> grpc@1.20.3 install /tmpfs/src/git/autosynth/working_repo/node_modules/grpc
> node-pre-gyp install --fallback-to-build --library=static_library

node-pre-gyp WARN Using needle for node-pre-gyp https download 
[grpc] Success: "/tmpfs/src/git/autosynth/working_repo/node_modules/grpc/src/node/extension_binary/node-v57-linux-x64-glibc/grpc_node.node" is installed via remote

> protobufjs@6.8.8 postinstall /tmpfs/src/git/autosynth/working_repo/node_modules/protobufjs
> node scripts/postinstall


> @google-cloud/logging@4.5.2 prepare /tmpfs/src/git/autosynth/working_repo
> npm run compile


> @google-cloud/logging@4.5.2 compile /tmpfs/src/git/autosynth/working_repo
> tsc -p . && cp -r src/v2 build/src/v2 && cp -r protos build && cp -r proto build && cp test/*.js build/test

npm notice created a lockfile as package-lock.json. You should commit this file.
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.9 (node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.9: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})

added 1286 packages from 1397 contributors and audited 7806 packages in 39.406s
found 5 vulnerabilities (1 low, 2 moderate, 2 high)
  run `npm audit fix` to fix them, or `npm audit` for details

> @google-cloud/logging@4.5.2 fix /tmpfs/src/git/autosynth/working_repo
> gts fix && eslint --fix '**/*.js'

synthtool > Cleaned up 2 temporary directories.
synthtool > Wrote metadata to synth.metadata.

[codecov]

Codecov Report

Merging #478 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #478   +/-   ##
=======================================
  Coverage   97.21%   97.21%           
=======================================
  Files          10       10           
  Lines         431      431           
  Branches       55       55           
=======================================
  Hits          419      419           
  Partials       12       12

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