[major] replace crayfish derivative microservices with scyllaridae

[joecorall]

Replace crayfish derivative microservices with scyllaridae.

As seen in this PR and Islandora/Crayfish#188, scyllaridae offers significantly less code complexity to add new microservices. Between this PR and Islandora/Crayfish#188 around 40K lines of code can be removed by replacing crayfish with scyllaridae. scyllaridae is basically an http service with a YAML based spec to define how derivatives are created when events are received by the service. This allows for new microserves to easily be created by only focusing on the input file source, what software needs to manipulate the input, and then printing the resulting file to stdout. Islandora's specifics around JWT auth, how the source file is streamed, and how the output is streamed, are all handled by the core scyllaridae service, and the spec is how individual microservices can implement their specific logic.

Some reasoning why this PR was created:

• We have 18 security advisories, all related to the outdated symfony version used by crayfish
  • https://github.com/Islandora-Devops/isle-buildkit/security/dependabot
• There is an RCE CVE with the latest version of crayfish: https://github.com/Islandora/Crayfish/security/advisories
  • scyllaridae is not vulnerable to this CVE
• outside of the latest work around the RCE CVE, crayfish hasn't been updated in two years

If there is interest in this, we can build a milliner alternative using scyllaridae and remove crayfish algother from buildkit.

Related to Islandora/documentation#2354 Islandora/Crayfish#188

[nigelgbanks]

Other than the one change, this looks good to go in, great work!!!

[joecorall]

gonna add some integration tests

[nigelgbanks]

Still just the issue with scyllaridae/rootfs/etc/s6-overlay/s6-rc.d/scyllaridae/dependencies.d/container-environment but otherwise great! Awesome to have the tests!