Regenerate websecurityscanner 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-websecurityscanner/synth.py.
synthtool > Ensuring dependencies.
synthtool > Pulling artman image.
latest: Pulling from googleapis/artman
Digest: sha256:5fd9aee1d82a00cebf425c8fa431f5457539562f5867ad9c54370f0ec9a7ccaa
Status: Image is up to date for googleapis/artman:latest
synthtool > Cloning googleapis.
synthtool > Running generator for google/cloud/websecurityscanner/artman_websecurityscanner_v1alpha.yaml.
synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/java.
synthtool > Running java formatter on 10 files
synthtool > Running java formatter on 1 files
synthtool > Running java formatter on 65 files
synthtool > Cleaned up 0 temporary directories.
synthtool > Wrote metadata to synth.metadata.

[codecov]

Codecov Report

Merging #4488 into master will increase coverage by <.01%.
The diff coverage is 70.58%.

@@ Coverage Diff @@## master #4488 +/- ##
============================================
+ Coverage 49.16% 49.16% +<.01% - Complexity 21913 21915 +2 
============================================
Files 2078 2078 Lines 207048 207082 +34 Branches 24084 24084 ============================================
+ Hits 101789 101813 +24 - Misses 97116 97126 +10 
Partials 8143 8143

Impacted Files	Coverage Δ	Complexity Δ
...urityscanner/v1alpha/WebSecurityScannerClient.java	82.16% <70.58%> (-2.61%)	48 <17> (+2)

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