flashy: Add support for 128M fb-meta
Summary: As title. This is to support platforms with larger flashes and images. Fixes oobgrader failure on gtartemis which has started to go beyond the 32M size.
Test Plan:
oobgrader on gtartemis which is 128M Flash.
```
oobgrader --host gtartemis-test-host -b openbmc.image.gtartemis:v2023.32.0 --flashy-tag 6746cb7 --wait
<snip>
<snip> c4746030-d209-4d88-b9de-18cee673c8f2 finished WorkflowStatus.FINISHED FinishStatus.SUCCEEDED
```
Workflow ID: c4746030-d209-4d88-b9de-18cee673c8f2
Ensure no regressions are observed in older ones.
```
oobgrader --host fby3-test-host -b openbmc.image.yosemite3:v2023.13.1 --flashy-tag 6746cb7 --wait
<snip>
<snip> b4524080-d79d-4ef2-a7e8-7fc97b224a0f finished WorkflowStatus.FINISHED FinishStatus.SUCCEEDED
```
Workflow ID: b4524080-d79d-4ef2-a7e8-7fc97b224a0f
Reviewed By: cjcon90
Differential Revision: D48207387
fbshipit-source-id: f0f349b9ab237a439c8f0088da573cff141828b9
