Add #prev_day and #next_day as counterparts to #yesterday and #tomorrow for Date, Time, and DateTime

`#on_weekend?` returns true if the receiving date/time falls on a Saturday or
Sunday.

`#next_weekday` returns a new date/time representing the next day that does
not fall on a Saturday or Sunday.

`#prev_weekday` returns a new date/time representing the previous day that
does not fall on a Saturday or Sunday.

Improve protect_from_forgery documentation.

removing unecessary default parameter in private method

Documenting 'remove_possible_method' and 'redefine_method' [ci skip]

'_singularize' only ever gets called with one argument

Propagate bind_values from join in subquery

`initialize_internals_callback` will attempt to assign attributes from
the current scope, which will fail if something defined the method
and calls super (meaning it won't hit `method_missing`).

Fixes #18339

Fix rollback of primarykey-less tables

If you have a table without a primary key, and an `after_commit` callback on that table (ie `has_transactional_callbacks?` returns true), then trying to rollback a transaction involving that record would result in “ActiveModel::MissingAttributeError: can't write unknown attribute ``”

Fix I18n regression introduced by #13832

Add Firebird support to test suite

Clean up secure_token_test

Fix TypeError in Fixture creation

Ruby 4.2 started doing `value.gsub('$LABEL', label)` for fixture label interpolation, but you can have have valid YAML where `label` isn't a String. 

For example:

```YAML
0:
  name: John
  email: johndoe@gmail.com
1:
  name: Jane
  email: janedoe@gmail.com
```

This YAML will create a label that is a Fixnum, causing `TypeError: no implicit conversion of Fixnum into String.`

remove unneeded check since /_one_time_conditions/ is not present anymore.

Reset template assertions without warnings

Addresses https://github.com/rails/rails/commit/ed56e596a0467390011bc9d56d462539776adac1#commitcomment-9145960

addresses https://github.com/rails/rails/commit/91949e48cf41af9f3e4ffba3e5eecf9b0a08bfc3#commitcomment-9144563

This adresses https://github.com/rails/rails/commit/1b7aa62b184c4410c99208f71b59bbac5c5f03be#commitcomment-9147803

Include newer `find_by` syntax example in 4.2 release notes for Adequate Record

Document all options for protect_from_forgery.

[ci skip]

simplify ActiveSupport.test_order definition

It was not done to be included