Add upgrade plans v3patch1 and v3patch2

[wojtek-coreum]

Description

Reviewers checklist:

• Try to write more meaningful comments with clear actions to be taken.
• Nit-picking should be unblocking. Focus on core issues.

Authors checklist

• Provide a concise and meaningful description
• Review the code yourself first, before making the PR.
• Annotate your PR in places that require explanation.
• Think and try to split the PR to smaller PR if it is big.

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This change is 

[miladz68]

Reviewed 4 of 4 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @dzmitryhil and @ysv)

[dzmitryhil]

Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @wojtek-coreum and @ysv)

a discussion (no related file):
Lint is failed

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[wojtek-coreum]

Reviewable status: 3 of 4 files reviewed, 1 unresolved discussion (waiting on @dzmitryhil, @miladz68, and @ysv)

a discussion (no related file):

Previously, dzmitryhil (Dzmitry Hil) wrote…

Lint is failed

Done.

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[dzmitryhil]

Reviewable status: 3 of 4 files reviewed, all discussions resolved (waiting on @miladz68 and @ysv)

[miladz68]

Reviewed 1 of 1 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @ysv)