ci: publish evergreen v4-dev release after each green push

- build.clj: version now read from PGLOADER_VERSION env var (fallback 4.0.0-SNAPSHOT)
- clojure-integration-tests.yml: add publish-dev job that runs after all tests pass
  on push events; overwrites assets on the fixed v4-dev pre-release tag so that
  .../releases/download/v4-dev/pgloader.jar always points to latest green HEAD.
  Also uploads a versioned copy pgloader-4.0.0-<sha>.jar for pinning.

tagging pgloader 3.6.10-3

tagging pgloader 3.6.10-2

pgloader 3.6.10

tagging package pgloader version debian/3.6.10-1

pgloader 3.6.9

tagging pgloader 3.6.9-1

pgloader 3.6.8

tagging pgloader 3.6.8-1

pgloader 3.6.7