Regenerate vision 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-vision/synth.py.
synthtool > Ensuring dependencies.
synthtool > Pulling artman image.
latest: Pulling from googleapis/artman
Digest: sha256:c6231efb525569736226b1f7af7565dbc84248efafb3692a5bb1d2d8a7975d53
Status: Image is up to date for googleapis/artman:latest
synthtool > Cloning googleapis.
synthtool > Running generator for google/cloud/vision/artman_vision_v1.yaml.
synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/java.
synthtool > Running java formatter on 81 files
synthtool > Running java formatter on 2 files
synthtool > Running java formatter on 176 files
synthtool > Running generator for google/cloud/vision/artman_vision_v1p1beta1.yaml.
synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/java.
synthtool > Running java formatter on 81 files
synthtool > Running java formatter on 1 files
synthtool > Running java formatter on 67 files
synthtool > Running generator for google/cloud/vision/artman_vision_v1p2beta1.yaml.
synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/java.
synthtool > Running java formatter on 81 files
synthtool > Running java formatter on 1 files
synthtool > Running java formatter on 91 files
synthtool > Running generator for google/cloud/vision/artman_vision_v1p3beta1.yaml.
synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/java.
synthtool > Running java formatter on 81 files
synthtool > Running java formatter on 2 files
synthtool > Running java formatter on 165 files
synthtool > Running generator for google/cloud/vision/artman_vision_v1p4beta1.yaml.
synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/java.
synthtool > Running java formatter on 81 files
synthtool > Running java formatter on 2 files
synthtool > Running java formatter on 171 files
synthtool > Cleaned up 0 temporary directories.
synthtool > Wrote metadata to synth.metadata.

[codecov]

Codecov Report

Merging #6093 into master will decrease coverage by <.01%.
The diff coverage is n/a.

@@ Coverage Diff @@## master #6093 +/- ##
============================================
- Coverage 47.38% 47.38% -0.01% + Complexity 27182 27180 -2 
============================================
Files 2523 2523 Lines 274581 274581 Branches 31380 31380 ============================================
- Hits 130123 130120 -3 - Misses 134850 134851 +1 - Partials 9608 9610 +2

Impacted Files	Coverage Δ	Complexity Δ
...e/cloud/vision/v1p4beta1/ImageAnnotatorClient.java	62% <ø> (ø)	19 <0> (ø)	⬇️
...able/gaxx/reframing/ReframingResponseObserver.java	88.99% <0%> (-1.84%)	29% <0%> (-1%)
...oogle/cloud/spanner/jdbc/SingleUseTransaction.java	86.87% <0%> (-0.91%)	39% <0%> (-1%)
...ain/java/com/google/cloud/pubsub/v1/Publisher.java	89.45% <0%> (+0.34%)	40% <0%> (ø)	⬇️

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