Regenerate containeranalysis 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-containeranalysis/synth.py.
synthtool > Ensuring dependencies.
synthtool > Pulling artman image.
latest: Pulling from googleapis/artman
Digest: sha256:9aed6bbde54e26d2fcde7aa86d9f64c0278f741e58808c46573e488cbf6098f0
Status: Image is up to date for googleapis/artman:latest
synthtool > Cloning googleapis.
synthtool > Running generator for google/devtools/containeranalysis/artman_containeranalysis_v1beta1.yaml.
synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/java.
synthtool > Running java formatter on 31 files
synthtool > Running java formatter on 2 files
synthtool > Running java formatter on 241 files
synthtool > Running generator for google/devtools/containeranalysis/artman_containeranalysis_v1.yaml.
synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/java.
synthtool > Replaced 'import com.google.iam.v1.TestIamPermissionsResponse;' in /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/java/gapic-google-cloud-containeranalysis-v1/src/main/java/com/google/cloud/devtools/containeranalysis/v1/ContainerAnalysisClient.java.
synthtool > Replaced '(\\s+private final ContainerAnalysisStub stub;.*)' in /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/java/gapic-google-cloud-containeranalysis-v1/src/main/java/com/google/cloud/devtools/containeranalysis/v1/ContainerAnalysisClient.java.
synthtool > Running java formatter on 31 files
synthtool > Running java formatter on 1 files
synthtool > Running java formatter on 7 files
synthtool > Cleaned up 0 temporary directories.
synthtool > Wrote metadata to synth.metadata.

[chingor13]

Combined into a single pull request #5850