fix(lua): io.read always reading 256 bytes rather than specified value #11754

Job	Run time
Run tests (x9dp2019)	2m 39s
Run tests (tx16s)	4m 56s
Run tests (nv14)	5m 18s
Run tests (el18)	5m 4s
Run tests (pl18)	4m 52s
Run tests (pl18ev)	5m 2s
Run tests (t12)	2m 37s
Run tests (t12max)	2m 44s
Run tests (t15)	5m 12s
Run tests (t16)	5m 20s
Run tests (t18)	5m 4s
Run tests (t8)	2m 35s
Run tests (tlite)	2m 37s
Run tests (t20)	2m 53s
Run tests (t14)	2m 43s
Run tests (t20v2)	2m 42s
Run tests (tx12)	2m 35s
Run tests (x10)	5m 4s
Run tests (x12s)	5m 9s
Run tests (x7)	2m 37s
Run tests (x9d)	2m 34s
Run tests (x9dp)	2m 33s
Run tests (x9e)	2m 38s
Run tests (x9lite)	2m 28s
Run tests (x9lites)	2m 57s
Run tests (xlite)	2m 42s
Run tests (xlites)	2m 38s
Run tests (mt12)	2m 53s
Run tests (gx12)	2m 55s
Run tests (nb4p)	4m 54s
Run builds (nv14;el18)	5m 20s
Run builds (pl18;pl18ev)	5m 17s
Run builds (t12;t12max)	2m 32s
Run builds (t15;t16;t18)	7m 53s
Run builds (t8;zorro;pocket;mt12;commando8)	5m 5s
Run builds (tlite;tpro;tprov2;tpros;bumblebee;lr3pro)	5m 52s
Run builds (t20;t20v2;t14)	3m 41s
Run builds (tx12;tx12mk2;boxer;gx12)	4m 21s
Run builds (tx16s)	3m 6s
Run builds (f16)	3m 7s
Run builds (v16)	3m 19s
Run builds (x10;x10express)	5m 39s
Run builds (x12s)	3m 21s
Run builds (x7;x7access)	2m 32s
Run builds (x9d;x9dp;x9dp2019)	3m 23s
Run builds (x9e;x9e-hall)	2m 31s
Run builds (x9lite;x9lites)	2m 29s
Run builds (xlite;xlites)	2m 44s
Run builds (mt12;gx12)	2m 51s
Run builds (nb4p)	3m 6s
Package firmwares	5s
	3h 5m 9s

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