Bump all Docker image versions to update Python to 3.7 and Tensorflow to 2.6.

These updates are required due to Python 3.6 coming to EOL and also to update
TensorFlow to a newer version.

Author: leandron

Jenkinsfile

@@ -45,14 +45,14 @@
 import org.jenkinsci.plugins.pipeline.modeldefinition.Utils
 
 // NOTE: these lines are scanned by docker/dev_common.sh. Please update the regex as needed. -->
-ci_lint = 'tlcpack/ci-lint:v0.68'
-ci_gpu = 'tlcpack/ci-gpu:v0.81'
-ci_cpu = 'tlcpack/ci-cpu:v0.81'
-ci_wasm = 'tlcpack/ci-wasm:v0.71'
-ci_i386 = 'tlcpack/ci-i386:v0.74'
-ci_qemu = 'tlcpack/ci-qemu:v0.10'
-ci_arm = 'tlcpack/ci-arm:v0.07'
-ci_hexagon = 'tlcpack/ci-hexagon:v0.01'
+ci_lint = 'tlcpack/ci-lint:v0.69'
+ci_gpu = 'tlcpack/ci-gpu:v0.82'
+ci_cpu = 'tlcpack/ci-cpu:v0.82'
+ci_wasm = 'tlcpack/ci-wasm:v0.72'
+ci_i386 = 'tlcpack/ci-i386:v0.75'
+ci_qemu = 'tlcpack/ci-qemu:v0.11'
+ci_arm = 'tlcpack/ci-arm:v0.08'
+ci_hexagon = 'tlcpack/ci-hexagon:v0.02'
 // <--- End of regex-scanned config.
 
 // Parameters to allow overriding (in Jenkins UI), the images