efibootmgr is returning utf-8

During node deploy or clean, Ironic Python Agent is doing call to efibootmgr in order for example to clean the EFI boot table

When IPA is calling get_boot_records() https://github.com/openstack/ironic-python-agent/blob/master/ironic_python_agent/efi_utils.py#L275 the code is translating to utf-16.
It seems that on some motherboards, like the one we are using (Tyan manufacturer), efibootmgr is returning UTF-8

/opt/ironic-python-agent/bin/python3
Python 3.11.2 (main, May 2 2024, 11:59:08) [GCC 12.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from ironic_python_agent import utils
>>> efi_output = utils.execute('efibootmgr', '-v', binary=True)
>>> print (efi_output)
(b'BootCurrent: 0004\nTimeout: 1 seconds\nBootOrder: 0004,0005,0006,0007,002D,0001,0009,0002\nBoot0000* AMIFWUpdate\tVenMedia(5023b95c-db26-429b-a648-bd47664c8012)/FvFile(1de64b8e-138b-4258-b7dd-f2d8ec142a9e)\nBoot0001 UEFI: Built-in EFI Shell\tVenMedia(5023b95c-db26-429b-a648-bd47664c8012)..BO\nBoot0002 debian\tVenHw(99e275e7-75a0-4b37-a2e6-c5385e6c00cb)\nBoot0004* UEFI: PXE IP4 Mellanox Network Adapter - A0:42:3F:41:4D:46\tPciRoot(0x3)/Pci(0x3,0x1)/Pci(0x0,0x0)/MAC(a0423f414d46,1)/IPv4(0.0.0.00.0.0.0,0,0)..BO\nBoot0005* UEFI: PXE IP4 Mellanox Network Adapter - A0:42:3F:41:4D:47\tPciRoot(0x3)/Pci(0x3,0x1)/Pci(0x0,0x1)/MAC(a0423f414d47,1)/IPv4(0.0.0.00.0.0.0,0,0)..BO\nBoot0006* UEFI: PXE IP4 Mellanox Network Adapter - 0C:42:A1:3D:3E:E8\tPciRoot(0x7)/Pci(0x3,0x1)/Pci(0x0,0x0)/MAC(0c42a13d3ee8,1)/IPv4(0.0.0.00.0.0.0,0,0)..BO\nBoot0007* UEFI: PXE IP4 Mellanox Network Adapter - 0C:42:A1:3D:3E:E9\tPciRoot(0x7)/Pci(0x3,0x1)/Pci(0x0,0x1)/MAC(0c42a13d3ee9,1)/IPv4(0.0.0.00.0.0.0,0,0)..BO\nBoot0009 AMI Virtual CDROM0 1.00\tBBS(USB,,0x0)/VenHw(5ce8128b-2cec-40f0-8372-80640e3dc858,ff00)..BO\nBoot002D* UEFI: PXE IP4 American Megatrends Inc.\tPciRoot(0x0)/Pci(0x8,0x1)/Pci(0x0,0x3)/USB(1,0)/USB(1,1)/MAC(4a3d41211dc2,0)/IPv4(0.0.0.00.0.0.0,0,0)..BO\n', b'')
>>> cmd_output = efi_output[0].decode('utf-16', errors='ignore')
>>> print (cmd_output)
潂瑯畃牲湥㩴〠〰楔敭畯㩴ㄠ猠捥湯獤䈊潯佴摲牥›〰㐰〬〰〰㘰〬〰〰䐲〬〰〰㤰〬〰ਲ潂瑯〰〰䵁䙉啗摰瑡॥敖䵮摥慩㔨㈰戳㔹扤㘲㐭㤲㙡㠴戭㑤㘷㐶㡣⤲䘯䙶汩⡥搱㙥戴攸㠳㈴㠵戭搷㉦㡤捥㐱愲改潂瑯〰†䕕䥆›畂汩湩䔠䥆匠敨汬嘉湥敍楤⡡〵㌲㥢挵搭㉢㈴戹愭㐶摢㜴㘶挴〸㈱䈮潂瑯〰㈰†敤楢湡嘉湥睈㤨改㜲攵㔷ち㐭㍢㉡㙥挭㌵㔸㙥っ挰⥢䈊潯ぴ〰⨴唠䙅㩉倠䕘䤠㑐䴠汥慬潮⁸敎睴牯摁灡整ぁ㐺㨲䘳㐺㨱䐴㐺श捐剩潯⡴砰⤳倯楣〨〬ㅸ⼩捐⡩砰砰⤰䴯䍁愨㐰㌲㑦㐱㑤⤱䤯癐⠴〰〮〮〮〬〬䈮潂瑯〰㔰䕕䥆›塐⁅偉‴敍汬湡硯丠瑥潷歲䄠慤瑰牥䄠㨰㈴㌺㩆ㄴ
㐺㩄㜴倉楣潒瑯〨⼩捐⡩砰砰⤱倯楣〨へ〬ㅸ⼩䅍⡃ち㈴昳ㄴ搴㜴ㄬ⼩偉㑶〨〮〮〮⤰佂䈊潯ぴ〰⨶唠䙅㩉倠䕘䤠㑐䴠汥慬潮⁸敎睴牯摁灡整䌰㐺㨲ㅁ㌺㩄䔳䔺स捐剩潯⡴砰⤷倯楣〨〬ㅸ⼩捐⡩砰砰⤰䴯䍁〨㑣愲㌱㍤敥⤱䤯癐⠴〰〮〮〮〬〬䈮潂瑯〰㜰䕕䥆›塐⁅偉‴敍汬湡硯丠瑥潷歲䄠慤瑰牥〠㩃㈴䄺㨱䐳㌺㩅㥅倉楣潒瑯〨㝸⼩捐⡩砰砰⤱倯楣〨へ〬ㅸ⼩䅍⡃挰㈴ㅡ搳攳㥥ㄬ⼩偉㑶〨〮〮〮⤰佂䈊潯ぴ〰‹䄠䥍嘠物畴污䌠剄䵏‰〰䈉卂唨䉓砰⤰嘯湥睈㔨散ㄸ㠲挲捥㐭昰㌸㈷㠭㘰〴㍥捤㔸晦〰䈮潂瑯〰䐲䕕䥆›塐⁅偉‴流牥捩湡䴠来瑡敲摮湉倉楣潒瑯〨へ
⼩捐⡩砰砰⤱倯楣〨へ〬⼩单⡂⤰唯䉓ㄨㄬ⼩䅍⡃愴搳ㄴㄲ搱㉣〬⼩偉㑶〨〮〮〮⤰佂
>>>
>>> cmd_output = efi_output[0].decode('utf-8', errors='ignore')
>>> print (cmd_output)
BootCurrent: 0004
Timeout: 1 seconds
BootOrder: 0004,0005,0006,0007,002D,0001,0009,0002
Boot0000* AMIFWUpdate VenMedia(5023b95c-db26-429b-a648-bd47664c8012)/FvFile(1de64b8e-138b-4258-b7dd-f2d8ec142a9e)
Boot0001 UEFI: Built-in EFI Shell VenMedia(5023b95c-db26-429b-a648-bd47664c8012)..BO
Boot0002 debian VenHw(99e275e7-75a0-4b37-a2e6-c5385e6c00cb)
Boot0004* UEFI: PXE IP4 Mellanox Network Adapter - A0:42:3F:41:4D:46 PciRoot(0x3)/Pci(0x3,0x1)/Pci(0x0,0x0)/MAC(a0423f414d46,1)/IPv4(0.0.0.00.0.0.0,0,0)..BO
Boot0005* UEFI: PXE IP4 Mellanox Network Adapter - A0:42:3F:41:4D:47 PciRoot(0x3)/Pci(0x3,0x1)/Pci(0x0,0x1)/MAC(a0423f414d47,1)/IPv4(0.0.0.00.0.0.0,0,0)..BO
Boot0006* UEFI: PXE IP4 Mellanox Network Adapter - 0C:42:A1:3D:3E:E8 PciRoot(0x7)/Pci(0x3,0x1)/Pci(0x0,0x0)/MAC(0c42a13d3ee8,1)/IPv4(0.0.0.00.0.0.0,0,0)..BO
Boot0007* UEFI: PXE IP4 Mellanox Network Adapter - 0C:42:A1:3D:3E:E9 PciRoot(0x7)/Pci(0x3,0x1)/Pci(0x0,0x1)/MAC(0c42a13d3ee9,1)/IPv4(0.0.0.00.0.0.0,0,0)..BO
Boot0009 AMI Virtual CDROM0 1.00 BBS(USB,,0x0)/VenHw(5ce8128b-2cec-40f0-8372-80640e3dc858,ff00)..BO
Boot002D* UEFI: PXE IP4 American Megatrends Inc. PciRoot(0x0)/Pci(0x8,0x1)/Pci(0x0,0x3)/USB(1,0)/USB(1,1)/MAC(4a3d41211dc2,0)/IPv4(0.0.0.00.0.0.0,0,0)..BO

The impact of that bug is that IPA is not cleaning the partition table, and deploy after deploy, filling the EFI table.