Accept Hash in before_send* callbacks again

[st0012]

It was unintentionally dropped in #2504. But because we do want to stop accepting Hash value in the future, I made it print deprecation messages when a Hash is passed as well.

Closes #2526

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.

Project coverage is 69.72%. Comparing base (1ee671c) to head (f699525).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
sentry-ruby/lib/sentry/client.rb	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2529      +/-   ##
==========================================
+ Coverage   69.32%   69.72%   +0.40%     
==========================================
  Files         125      125              
  Lines        4721     4724       +3     
==========================================
+ Hits         3273     3294      +21     
+ Misses       1448     1430      -18     

Components	Coverage Δ
sentry-ruby	60.54% <0.00%> (+0.54%)	⬆️
sentry-rails	96.76% <ø> (ø)
sentry-sidekiq	97.08% <ø> (ø)
sentry-resque	92.85% <ø> (ø)
sentry-delayed_job	95.65% <ø> (ø)
sentry-opentelemetry	99.31% <ø> (ø)

Files with missing lines	Coverage Δ
sentry-ruby/lib/sentry/client.rb	47.82% <0.00%> (-1.07%)	⬇️

... and 4 files with indirect coverage changes

[edariedl]

Hello, I understand that returning the Hash from the before_send* is deprecated byt this PR. But, the official documentation still suggests to do it if someone wants to scrub the data before they are sent to Sentry see https://docs.sentry.io/platforms/ruby/guides/rails/data-management/sensitive-data/#scrubbing-data

require "active_support/parameter_filter"

Sentry.init do |config|
  #...

  # this example uses Rails' parameter filter to sanitize the event payload
  # for Rails 6+
  filter = ActiveSupport::ParameterFilter.new(Rails.application.config.filter_parameters)
  # for Rails 5
  filter = ActionDispatch::Http::ParameterFilter.new(Rails.application.config.filter_parameters)
  config.before_send = lambda do |event, hint|
    filter.filter(event.to_hash)
  end
end

Is there a new suggested way to scrub the date given the current one will be deprecated?

[st0012]

#2524 is what we'll use to track the documentation update and the author provided a good example to work with the event types for now.