default or selected kernelversion does not have config value CONFIG_IDEPCI_SHARE_IRQ.
Result is shown for kernelversion 5.15.113

Sharing PCI IDE interrupts support

configname: CONFIG_IDEPCI_SHARE_IRQ

Linux Kernel Configuration
└─>Device Drivers
└─>ATA/ATAPI/MFM/RLL support
└─>Sharing PCI IDE interrupts support
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
Some ATA/IDE chipsets have hardware support which allows for
sharing a single IRQ with other cards. To enable support for
this in the ATA/IDE driver, say Y here.

It is safe to say Y to this question, in most cases.
If unsure, say N.