Improve the accuracy of duration calculations in cron jobs monitoring #3580

Job	Run time
Ruby 2.7 & Sidekiq 5.0, options - null	36s
Ruby 3.0 & Sidekiq 5.0, options - null	26s
Ruby 3.1 & Sidekiq 5.0, options - null	30s
Ruby 3.2 & Sidekiq 5.0, options - null	27s
Ruby 3.3 & Sidekiq 5.0, options - null	43s
Ruby jruby & Sidekiq 5.0, options - null	1m 2s
Ruby 2.7 & Sidekiq 6.5, options - null	35s
Ruby 3.0 & Sidekiq 6.5, options - null	30s
Ruby 3.1 & Sidekiq 6.5, options - null	31s
Ruby 3.2 & Sidekiq 6.5, options - null	24s
Ruby 3.3 & Sidekiq 6.5, options - null	31s
Ruby jruby & Sidekiq 6.5, options - null	1m 6s
Ruby 2.7 & Sidekiq 7.0, options - null	38s
Ruby 3.0 & Sidekiq 7.0, options - null	25s
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" }	26s
Ruby 3.3 & Sidekiq 7.0, options - null	23s
Ruby jruby & Sidekiq 7.0, options - null	56s
Ruby 2.4 & Sidekiq 5, options - null	39s
Ruby 2.5 & Sidekiq 5, options - null	36s
Ruby 2.5 & Sidekiq 6, options - null	36s
Ruby 2.6 & Sidekiq 5, options - null	49s
Ruby 2.6 & Sidekiq 6, options - null	37s
Ruby jruby & Sidekiq 6, options - null	1m 7s
	15m 3s

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