Great news!
Neither the "attiny" boards platform you are using, nor even the far more feature rich alternative "ATTinyCore" platform provide support for doing this via Arduino IDE. So you would need to use a standalone tool such as AVRDUDE to accomplish this.
However, you should be aware that the reset functionality is required to program the ATtiny44 via the ISP programmer, including setting the configuration fuses. So if you did program the RSTDISBL fuse, you would find that you were no longer able to upload sketches to the ATtiny44, and that you couldn't even use your ISP programmer unprogram the RSTDISBL fuse. The only way to restore the reset functionality is using a special "high voltage" programmer.
So the only time it makes sense to program the RSTDISBL fuse is you have a 100% finished project that requires the extra I/O pin, where you are going to program the chip with that program and never update it again.
Otherwise, you are better off just using a chip with more I/O (e.g., ATmega328P).