Regenerate spanner client

[yoshi-automation]

This PR was generated using Autosynth. 🌈

Log from Synthtool

synthtool > Executing /tmpfs/src/git/autosynth/working_repo/google-cloud-clients/google-cloud-spanner/synth.py.
synthtool > Ensuring dependencies.
synthtool > Pulling artman image.
latest: Pulling from googleapis/artman
Digest: sha256:c773192618c608a7a0415dd95282f841f8e6bcdef7dd760a988c93b77a64bd57
Status: Image is up to date for googleapis/artman:latest
synthtool > Cloning googleapis.
synthtool > Running generator for google/spanner/artman_spanner.yaml.
synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/java.
synthtool > Running generator for google/spanner/admin/database/artman_spanner_admin_database.yaml.
synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/java.
synthtool > Running generator for google/spanner/admin/instance/artman_spanner_admin_instance.yaml.
synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/java.
synthtool > Running java formatter on 190 files
synthtool > Running java formatter on 1 files
synthtool > Running java formatter on 80 files
synthtool > Running java formatter on 1 files
synthtool > Running java formatter on 25 files
synthtool > Running java formatter on 1 files
synthtool > Running java formatter on 32 files
synthtool > Cleaned up 0 temporary directories.
synthtool > Wrote metadata to synth.metadata.

[codecov]

Codecov Report

Merging #6818 into master will increase coverage by <.01%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #6818      +/-   ##
============================================
+ Coverage     46.37%   46.37%   +<.01%     
- Complexity    28028    28044      +16     
============================================
  Files          2615     2615              
  Lines        288309   288309              
  Branches      33809    33804       -5     
============================================
+ Hits         133709   133710       +1     
  Misses       144334   144334              
+ Partials      10266    10265       -1

Impacted Files	Coverage Δ	Complexity Δ
.../com/google/cloud/pubsub/v1/MessageDispatcher.java	85.12% <0%> (+0.51%)	23% <0%> (ø)	⬇️

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