Tracker: commits to revert before next upstream sync

[ARR4N]

PRs introducing changes also performed later in geth. Reverting their commits before merging the upstream branch will avoid conflicts.

1. refactor!(core/types): Block method WithBody(Body) signature #110
2. chore!: remove memsize #155
3. chore: cherry-pick all to main #187 individual commits, as appropriate.
4. crypto/bn256/cloudflare: pull in upstream fix for R27 and R29 usage #191 (i.e. commit ab5ad25)
5. The cherry-picked commit of crypto/secp256k1: update libsecp256k1 (#31242) #194 (but not the required linter fix in the same PR).
6. crypto/kz4844: pass blobs by ref (#29050) #199
7. Cherry pick eip 7951 #214