Resolve the shellcheck findings actionlint reports so that
`make lint.workflows` passes:
- quote unquoted variable expansions (SC2086) and command substitutions
(SC2046)
- split `export VAR=$(...)` into a separate assignment and export so a
failing command substitution is not masked by export's exit status
(SC2155)
- double-quote kubectl jsonpath arguments inside `sh -c '...'` loops so
the single quotes no longer break out of the wrapper (SC1083)
- annotate intentional deferred-expansion `sh -c '...'` bodies and the
intentional `for ... in $sockets` word splitting with targeted
`# shellcheck disable` directives (SC2016, SC2086)
- drop unused command-output captures (SC2034), simplify a `\! -z` test
(SC2236) and fix nested same-type quoting (SC2140)
Signed-off-by: Joshua Hoblitt <josh@hoblitt.com>
(cherry picked from commit 826f8944d1)
Joshua Hoblitt
046d907dbb