Regenerate firestore client

[yoshi-automation]

This PR was generated using Autosynth. 🌈

Here's the log from Synthtool:

synthtool > Executing /tmpfs/src/git/autosynth/working_repo/google-cloud-clients/google-cloud-firestore/synth.py.
synthtool > Ensuring dependencies.
synthtool > Pulling artman image.
latest: Pulling from googleapis/artman
Digest: sha256:d9597f983d1d4e61272c63cb97b7d8f8234da9999526c35d357de3d781f0ec1b
Status: Image is up to date for googleapis/artman:latest
synthtool > Cloning googleapis.
synthtool > Running generator for google/firestore/admin/artman_firestore_v1.yaml.
synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/java.
synthtool > Running java formatter on 95 files
synthtool > Running java formatter on 1 files
synthtool > Running java formatter on 50 files
synthtool > Running generator for google/firestore/artman_firestore.yaml.
synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/java.
synthtool > Running java formatter on 95 files
synthtool > Running java formatter on 1 files
synthtool > Running java formatter on 87 files
synthtool > Running generator for google/firestore/artman_firestore_v1.yaml.
synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/java.
synthtool > Running java formatter on 95 files
synthtool > Running java formatter on 1 files
synthtool > Running java formatter on 87 files
synthtool > Cleaned up 0 temporary directories.
synthtool > Wrote metadata to synth.metadata.

[codecov]

Codecov Report

Merging #4963 into master will not change coverage.
The diff coverage is n/a.

@@ Coverage Diff @@## master #4963 +/- ##
=========================================
Coverage 50.36% 50.36% Complexity 23665 23665 =========================================
Files 2232 2232 Lines 225859 225859 Branches 24956 24956 =========================================
Hits 113751 113751 Misses 103511 103511 Partials 8597 8597

Impacted Files	Coverage Δ	Complexity Δ
...m/google/cloud/firestore/v1/FirestoreSettings.java	16.98% <ø> (ø)	4 <0> (ø)	⬇️
...cloud/firestore/v1/stub/FirestoreStubSettings.java	79.54% <ø> (ø)	23 <0> (ø)	⬇️
...com/google/cloud/firestore/v1/FirestoreClient.java	56.19% <ø> (ø)	31 <0> (ø)	⬇️

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