Allow configuring maxIRQs #2224

Job	Run time
Spelling, Style, Boards, Package	1m 35s
Build PlatformIO Examples	2m 58s
Mac (macOS-12)	2m 34s
Build 0	7m 10s
Mac (macOS-14)	2m 7s
Build RP2350 0	5m 41s
Build 1	6m 49s
Build TinyUSB Examples	3m 59s
Build RP2350 1	5m 53s
Build 2	8m 14s
Build RP2350 2	7m 24s
Build 3	7m 23s
Build Every Variant 0	5m 37s
Build RP2350 3	6m 16s
Windows	3m 8s
Build 4	6m 59s
Build Every Variant 1	6m 2s
Build RP2350 4	6m 32s
Build 5	6m 31s
Build RP2350 5	5m 42s
	1h 48m 34s

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