Add mysqlbinlog and xtrabackup to the vitess/lite image

[frouioui]

Description

This Pull Request modifies the vitess/lite image by basing it on the mysql80 bootstrap image instead of common and copying the mysqlbinlog image from the base image. It also now installs xtrabackup on it.

~/vitess# docker build -f docker/lite/Dockerfile -t vitess/lite:test . 
...
~/vitess# docker run -it vitess/lite:test bash 
vitess@8b74fb4dd126:/$ xtrabackup -v
xtrabackup version 8.0.35-30 based on MySQL server 8.0.35 Linux (x86_64) (revision id: 6beb4b49)
vitess@8b74fb4dd126:/$ mysqlbinlog -V
mysqlbinlog  Ver 8.0.36 for Linux on x86_64 (MySQL Community Server - GPL)
vitess@8b74fb4dd126:/$

The image size is slightly increased from 1.22GB to 1.49GB:

~/vitess# docker image ls
REPOSITORY         TAG          IMAGE ID       CREATED         SIZE
vitess/lite        test          10e43cf2cf7b      2 minutes ago   1.49GB
vitess/lite        latest       64435ce82eb0   7 hours ago       1.22GB

Cleanups

I am also removing the lite ubi7 and ubi8 images in this PR as they don't seem to be used and @aquarapid (who added them initially) suggested.

We never built or pushed the .testing variant and can be replaced by vttestserver which we already build and push for every commit to main and tag. This Dockerfile is now removed.

With only one Dockerfile left in lite, the Makefile is also simplified.

Related Issue(s)

• Part of mysqlbinlog and xtrabackup missing from vitess/lite #15776
• Fixes The need to include a mysqlbinlog binary in a k8s deployment  #15452

Checklist

• "Backport to:" labels have been added if this change should be back-ported to release branches
• If this change is to be back-ported to previous releases, a justification is included in the PR description
• Tests were added or are not required
• Did the new or modified tests pass consistently locally and on CI?
• Documentation was added or is not required

Deployment Notes

[vitess-bot]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.44%. Comparing base (a89b2cb) to head (d896a3b).
Report is 8 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #15775      +/-   ##
==========================================
+ Coverage   68.43%   68.44%   +0.01%     
==========================================
  Files        1556     1558       +2     
  Lines      195433   195822     +389     
==========================================
+ Hits       133743   134035     +292     
- Misses      61690    61787      +97     

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[frouioui]

Actually I will try to add xtrabackup into the lite image as part of this PR. Re-marking this as draft.

[shlomi-noach]

Nice! Thank you