Refs #36849 - Remove deprecated URI.{encode,decode}

These are dropped in Ruby 3.0

Fixes #36395 - move value setting to seed

Fixes #4007 - updating users email to be optional (#9279)

Fixes #34526 - Switch Rails version to 6.1

Changes overview:
- Set default Rails version to 6.1
- Required dynfow >= 1.6.5
- Cleanup deprecation warnings in config/as_deprecation_whitelist.yaml
- ActiveSupport::ParameterFilter instead of ActionDispatch::Http::ParameterFilter...

Fixes #32572 - PBKDF2 password hashing support

Signed-off-by: Lukas Zapletal <lzap+git@redhat.com>

Fixes #32086 - seed locking

Refs #30098 - drop trends import

Fixes #28519: Hash and run database seeds on startup

On startup, check for all available seed files and commute a hash
of all of them. Compare this hash to one stored in the database,
if the hash has changed run database seeds, otherwise skip running
them.

Fixes #23765 - bcrypt hash password instead sha1

Fixes #26085 - Set default taxonomy setting to seeded taxonomies