Simplify ActiveJob specs setup #3498

Job	Run time
Ruby 2.7 & Sidekiq 5.0, options - null	40s
Ruby 3.0 & Sidekiq 5.0, options - null	26s
Ruby 3.1 & Sidekiq 5.0, options - null	37s
Ruby 3.2 & Sidekiq 5.0, options - null	37s
Ruby 3.3 & Sidekiq 5.0, options - null	27s
Ruby jruby & Sidekiq 5.0, options - null	1m 7s
Ruby 2.7 & Sidekiq 6.5, options - null	46s
Ruby 3.0 & Sidekiq 6.5, options - null	46s
Ruby 3.1 & Sidekiq 6.5, options - null	32s
Ruby 3.2 & Sidekiq 6.5, options - null	30s
Ruby 3.3 & Sidekiq 6.5, options - null	32s
Ruby jruby & Sidekiq 6.5, options - null	1m 9s
Ruby 2.7 & Sidekiq 7.0, options - null	41s
Ruby 3.0 & Sidekiq 7.0, options - null	39s
Ruby 3.1 & Sidekiq 7.0, options - null	30s
Ruby 3.2 & Sidekiq 7.0, options - { "rubyopt": "--enable-frozen-string-literal --debug=frozen-string-literal" }	28s
Ruby 3.3 & Sidekiq 7.0, options - null	26s
Ruby jruby & Sidekiq 7.0, options - null	1m 17s
Ruby 2.4 & Sidekiq 5, options - null	1m 22s
Ruby 2.5 & Sidekiq 5, options - null	56s
Ruby 2.5 & Sidekiq 6, options - null	50s
Ruby 2.6 & Sidekiq 5, options - null	55s
Ruby 2.6 & Sidekiq 6, options - null	45s
Ruby jruby & Sidekiq 6, options - null	1m 25s
	18m 23s

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