* fix: apt cache performance

Use a single call to apt-cache to reduce the time needed to lookup
package versions.

Also:
* Added millisecond details to log timing so slow operations can be more
  easily identified.
* Perform apt update before determining package versions.

Fixes #103

* chore: descriptive variable names and use log_err

Added the review feedback, updating variable names to be more
descriptive and using log_err where appropriate.

* Pull dev upstream to staging. (#112)

* Use awk to enclose filename in single quotes tar #99

* Add null field separator so filenames don't get broken up.

* Move upload logs up in the action sequence so it captures data before it gets deleted.

* Fix awk (#109)

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Co-authored-by: sn-o-w <cristian.silaghi@mozilla.ro>

* Fix awk delimiter.

Pull in fix by @sn-o-w in https://github.com/sn-o-w/cache-apt-pkgs-action/commit/d0ee83b497ac30023e51cd526c62e57b07501912 mentioned in issue #99

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Co-authored-by: sn-o-w <cristian.silaghi@mozilla.ro>