LLD does not recognize -T for -m i386pe

LLD does not recognize the linker script argument when in i386pe linker emulation mode.

Minimum reproducible command:

ld.lld -m i386pe -T linkerscript.ld

Results in lld: error: unknown argument: -T

Start by running the minimum reproducible command with lld and the provided linker-script argument, then trace how i386pe linker emulation parses command-line options. Done means -T linkerscript.ld is accepted in i386pe mode without the reported unknown-argument error, with relevant regression coverage added.

Written by the indexing model from the issue text.