fix(rainmaker): Fix the 8MB partition scheme

[P-R-O-C-H-Y]

Description of Change

This PR fixes the 8MB RainMaker partition scheme.

Tests scenarios

Compiled successfully with RainMaker Switch example.

Related links

https://esp32.com/viewtopic.php?t=45335

[github-actions]

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[Copilot]

Pull Request Overview

This PR fixes the 8MB RainMaker partition scheme by adjusting OTA partition sizes and updating board configuration settings. Key changes include updating partition offsets/sizes in the CSV file and consistently revising the upload maximum sizes across multiple board definitions.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
tools/partitions/rainmaker_8MB.csv	Updated ota_0 and ota_1 partition sizes to align with the 8MB scheme
boards.txt	Adjusted upload.maximum_size values for rainmaker_8MB across various board configurations

Comments suppressed due to low confidence (2)

tools/partitions/rainmaker_8MB.csv:4

• Ensure that the revised partition size (0x3EA000) for ota_0 is correctly aligned with the overall flash memory layout and compatible with OTA update routines.

+ota_0,     app,   ota_0,   0x10000,  0x3EA000,

boards.txt:1113

• Verify that the updated upload maximum size value (4096000) properly reflects the new partition scheme and does not introduce boundary issues.

+esp32c3.menu.PartitionScheme.rainmaker_8MB.upload.maximum_size=4096000