add BOOT_LOAD_PIN, update BL from SRAM and Jeff Probe Board#203

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hlyi wants to merge 13 commits intoadafruit:masterfrom hlyi:v3.15.0-bl_pin_sram-jp

+623-8

Commits on Jul 21, 2023

add BOOT_LOAD_PIN support. add jeff probe board. And support for flash bootloader from SRAM which does not touch application code
hlyi
committed

Commits on Oct 2, 2023

Commits on Jan 21, 2024