chore: use units on dashboard

[onbjerg]

Some adjustments to the dashboard

• The graphs that used to say (bytes) now use the bytes unit instead (buffer sizes, tx pool size, ...)
• The error graphs now plot cps (errors/s)
• Two graphs utilize inverted y-axis to visualize two opposing operations (insert/remove, tx/rx). The "Network transaction channel" graph wasn't really clear to me since it just plotted 0, -1 or +1 for me all the time. See example below of these two graphs

[codecov]

Codecov Report

Merging #3684 (04aae2c) into main (f116040) will decrease coverage by 0.04%.
The diff coverage is n/a.

see 6 files with indirect coverage changes

Flag	Coverage Δ
integration-tests	15.91% <ø> (+<0.01%)	⬆️
unit-tests	64.09% <ø> (-0.04%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
reth binary	26.35% <ø> (ø)
blockchain tree	81.25% <ø> (ø)
pipeline	86.69% <ø> (ø)
storage (db)	73.48% <ø> (ø)
trie	94.66% <ø> (ø)
txpool	49.34% <ø> (-0.61%)	⬇️
networking	77.81% <ø> (-0.02%)	⬇️
rpc	58.09% <ø> (ø)
consensus	63.35% <ø> (ø)
revm	34.86% <ø> (ø)
payload builder	6.83% <ø> (ø)
primitives	88.24% <ø> (-0.01%)	⬇️