removing symlink logic and dynamically generating the flash procedures

Summary: This diff refactors the flashy tool's flash procedures by removing many individual platform-specific flash procedure files and dynamically generates the procedures.

Test Plan:
```
[[email protected] /data/users/kaant/openbmc/tools/flashy (helium)]$ ./build.sh ; echo $?
0
```

{P1923389586}

Old Version
```
[[email protected] /data/users/kaant/openbmc/tools/flashy (helium)]$ grep step.RegisterStep flash_procedure/*
flash_procedure/flash_angelslanding.go: step.RegisterStep(flash.FlashCpVboot)
flash_procedure/flash_bletchley.go:     step.RegisterStep(flash.FlashCp)
flash_procedure/flash_catalina.go:      step.RegisterStep(flash.FlashCp)
flash_procedure/flash_clearcreek.go:    step.RegisterStep(flash.FlashCpVboot)
flash_procedure/flash_clemente.go:      step.RegisterStep(flash.FlashCp)
flash_procedure/flash_cloudripper.go:   step.RegisterStep(flash.FlashCp)
flash_procedure/flash_cmm.go:   step.RegisterStep(flash.FlashCp)
flash_procedure/flash_elbert.go:        step.RegisterStep(flash.FlashCp)
flash_procedure/flash_emeraldpools.go:  step.RegisterStep(flash.FlashCpVboot)
flash_procedure/flash_fbdarwin.go:      step.RegisterStep(flash.FlashCp)
flash_procedure/flash_fbgp2.go: step.RegisterStep(flash.FlashCpVboot)
flash_procedure/flash_fbtp.go:  step.RegisterStep(flash.FlashCpVboot)
flash_procedure/flash_fbttn.go: step.RegisterStep(flash.FlashCpVboot)
flash_procedure/flash_fby2.go:  step.RegisterStep(flash.FlashCpVboot)
flash_procedure/flash_fby35.go: step.RegisterStep(flash.FlashCpVboot)
flash_procedure/flash_fby3.go:  step.RegisterStep(yv3FlashStep)
flash_procedure/flash_fuji.go:  step.RegisterStep(flash.FlashCp)
flash_procedure/flash_galaxy100.go:     step.RegisterStep(flash.FlashCp)
flash_procedure/flash_grandcanyon.go:   step.RegisterStep(flash.FlashCpVboot)
flash_procedure/flash_grandteton.go:    step.RegisterStep(flash.FlashCpVboot)
flash_procedure/flash_greatlakes.go:    step.RegisterStep(flash.FlashCpVboot)
flash_procedure/flash_gtartemis.go:     step.RegisterStep(flash.FlashCpVboot)
flash_procedure/flash_halfdome.go:      step.RegisterStep(flash.FlashCpVboot)
flash_procedure/flash_harma.go: step.RegisterStep(flash.FlashCp)
flash_procedure/flash_inspirationpoint.go:      step.RegisterStep(flash.FlashCpVboot)
flash_procedure/flash_janga.go: step.RegisterStep(flash.FlashCp)
flash_procedure/flash_javaisland.go:    step.RegisterStep(flash.FlashCpVboot)
flash_procedure/flash_lightning.go:     step.RegisterStep(flash.FlashCp)
flash_procedure/flash_meru.go:  step.RegisterStep(flash.FlashCp)
flash_procedure/flash_minerva.go:       step.RegisterStep(flash.FlashCp)
flash_procedure/flash_minipack3n.go:    step.RegisterStep(flash.FlashCp)
flash_procedure/flash_minipack.go:      step.RegisterStep(flash.FlashCp)
flash_procedure/flash_montblanc.go:     step.RegisterStep(flash.FlashCp)
flash_procedure/flash_morgan800cc.go:   step.RegisterStep(flash.FlashCp)
flash_procedure/flash_northdome.go:     step.RegisterStep(flash.FlashCpVboot)
flash_procedure/flash_sandia.go:        step.RegisterStep(flash.FlashCp)
flash_procedure/flash_santabarbara.go:  step.RegisterStep(flash.FlashCp)
flash_procedure/flash_sonorapass.go:    step.RegisterStep(flash.FlashCp)
flash_procedure/flash_tahan.go: step.RegisterStep(flash.FlashCp)
flash_procedure/flash_ventura.go:       step.RegisterStep(flash.FlashCp)
flash_procedure/flash_wedge100.go:      step.RegisterStep(flash.FlashCp)
flash_procedure/flash_wedge400.go:      step.RegisterStep(flash.FlashCp)
flash_procedure/flash_wedge.go: step.RegisterStep(flash.FlashCp)
flash_procedure/flash_yamp.go:  step.RegisterStep(flash.FlashCp)
flash_procedure/flash_yosemite4.go:     step.RegisterStep(flash.FlashCp)
flash_procedure/flash_yosemite.go:      step.RegisterStep(flash.FlashCp)
```
New Version
```
	"angelslanding":    flash.FlashCpVboot,
	"bletchley15":      flash.FlashCp,
	"bletchley":        flash.FlashCp,
	"catalina":         flash.FlashCp,
	"clearcreek":       flash.FlashCpVboot,
	"clemente":         flash.FlashCp,
	"elbert":           flash.FlashCp,
	"emeraldpools":     flash.FlashCpVboot,
	"fbdarwin":         flash.FlashCp,
	"fbgp2":            flash.FlashCpVboot,
	"fbtp":             flash.FlashCpVboot,
	"fbttn":            flash.FlashCpVboot,
	"fby2":             flash.FlashCpVboot,
	"fby35":            flash.FlashCpVboot,
	"fby3":             flash.FlashCpVboot,
	"fuji":             flash.FlashCp,
	"grandcanyon":      flash.FlashCpVboot,
	"grandteton":       flash.FlashCpVboot,
	"greatlakes":       flash.FlashCpVboot,
	"gtartemis":        flash.FlashCpVboot,
	"halfdome":         flash.FlashCpVboot,
	"harma":            flash.FlashCp,
	"inspirationpoint": flash.FlashCpVboot,
	"janga":            flash.FlashCp,
	"javaisland":       flash.FlashCpVboot,
	"lightning":        flash.FlashCp,
	"meru":             flash.FlashCp,
	"minerva":          flash.FlashCp,
	"minipack3n":       flash.FlashCp,
	"minipack":         flash.FlashCp,
	"montblanc":        flash.FlashCp,
	"morgan800cc":      flash.FlashCp,
	"northdome":        flash.FlashCpVboot,
	"santabarbara":     flash.FlashCp,
	"tahan":            flash.FlashCp,
	"ventura":          flash.FlashCp,
	"wedge100":         flash.FlashCp,
	"wedge400":         flash.FlashCp,
	"yamp":             flash.FlashCp,
	"yosemite4":        flash.FlashCp,
	"yosemite":         flash.FlashCp,
```

Functional Tests
{P1926900687}
{P1926904572}
{P1926898122}
{P1926898692}

Rollback Plan:

Reviewed By: malikrafsan

Differential Revision: D80937696

fbshipit-source-id: d6722a79ef475a02293b5eddd97f3b8a4227d447

Author: kaanturkmen