feat(blobs): Remove ts blob oracle

[MirandaWood]

Similar to #9982

Simulation time for block root in #9302 (now #10188) is around a minute since adding blob calculations in BigNum. This is acceptable for most tests, but network tests cannot handle it without significatly changing slot and claim times.
Until simulation of this unconstrained code can be done at similar times to other rollup circuits (~300ms), I added an oracle to calculate the blob public inputs: b75a6f7
This is used in simulation only, and the full circuit properly proves we have constructed a blob with the block's tx effects.