Rewrite of publish-minimum-versions.sh to add some baseline tests for
up-to-date status of minimum-versions.md, and adds first test against
source data, where we have it, with language-subtag-registry.
Note: there is a bit of potential confusion about the difference between
/resources/builder.inc.sh (the full implementation for builder scripts),
and /resources/build/builder.inc.sh (the source script that builder
scripts should always use).
This allows us to make assumptions that will always be true for builder
scripts that may not be true for other scripts, such as setting base
folder.
Fixes#11324.
* Always `cd "$THIS_SCRIPT_PATH"`
* Remove unnecessary `cd` from all build.sh
* Remove unnecessary `set -eu` from all build.sh (and `# set -x`)
* Replace old build-utils.sh incantation in a few build.sh scripts
This sets us up to run all common/ and resources/ tests from a single
script, common/build.sh. This test will be run on each platform for all
changes made in common/ or resources/.
Also renamed files and paths for consistency in resources/ and updated
tests accordingly.
