added LoadProgWithPinType method to support NONE pinType

[nithu0115]

Issue #, if available: N/A

Description of changes: added LoadProgWithPinType method to support NONE pinType.
when PIN_NONE is set, we expect there is no pinPath and load the program. However, the existing code is looking for pinPath resulting in prog load failure

{"level":"info","ts":"2024-11-05T16:45:25.176Z","caller":"elfparser/elf.go:654","msg":"Sec 'tc_cls': found program 'handle_ingress' at insn offset 0 (0 bytes), code size 310 insns (2480 bytes)\n"}
{"level":"info","ts":"2024-11-05T16:45:25.178Z","caller":"elfparser/elf.go:290","msg":"Load prog done with fd : 11"}
{"level":"info","ts":"2024-11-05T16:45:25.178Z","caller":"progs/loader.go:247","msg":"error creating directory \"/sys/fs/bpf/globals/aws/programs\": mkdir /sys/fs/bpf/globals: no such file or directory"}
{"level":"error","ts":"2024-11-05T16:45:25.178Z","caller":"elfparser/elf.go:290","msg":"pin prog failed error creating directory \"/sys/fs/bpf/globals/aws/programs\": mkdir /sys/fs/bpf/globals: no such file or directory"}
{"level":"info","ts":"2024-11-05T16:45:25.178Z","caller":"elfparser/elf.go:660","msg":"Failed to load prog%!(EXTRA string=error, *errors.errorString=error creating directory \"/sys/fs/bpf/globals/aws/programs\": mkdir /sys/fs/bpf/globals: no such file or directory)"}
bash-4.2#

This pr will fix above issue.

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[jayanthvn]

Seems like you are using maps pin option to decide if the program needs pinning? I think we should discuss this..